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Oracle Hints Tutorial for improving performance
 
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Oracle Hints Tutorial for improving performance APPEND PARALLEL JOIN INDEX NO_INDEX SELECT /*+ FIRST_ROWS(10) */ * FROM emp WHERE deptno = 10; SELECT /*+ ALL_ROWS */ * FROM emp WHERE deptno = 10; SELECT /*+ NO_INDEX(emp emp_dept_idx) */ * FROM emp, dept WHERE emp.deptno = dept.deptno; SELECT /*+ INDEX(e,emp_dept_idx) */ * FROM emp e WHERE e.deptno = 10; -- SELECT /*+ INDEX(scott.emp,emp_dept_idx) */ * FROM scott.emp; SELECT /*+ AND_EQUAL(e,emp_dept_idx) */ * FROM emp e; SELECT /*+ INDEX_JOIN(e,emp_dept_idx) */ * FROM emp e; SELECT /*+ PARALLEL_INDEX(e,emp_dept_idx , 8) */ * FROM emp e; SELECT /*+ LEADING (dept) */ * FROM emp, dept WHERE emp.deptno = dept.deptno; SELECT /*+ PARALLEL(8) CACHE (e) FULL (e) */ * FROM emp e ; SELECT /*+ PARALLEL FULL (e) */ * FROM emp e ; SELECT /*+ PARALLEL USE_MERGE (emp dept) */ * FROM emp, dept WHERE emp.deptno = dept.deptno; -- SORT Merge Join SELECT /*+ PARALLEL USE_HASH (emp dept) */ * FROM emp, dept WHERE emp.deptno = dept.deptno; -- Hash Join SELECT /*+ PARALLEL */ * FROM emp e ; INSERT /*+ APPEND */ INTO mytmp select /*+ CACHE (e) */ *from emp e; commit;
Views: 6543 TechLake
Oracle Hints - FIRST_ROWS - Example
 
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Excerpt from "Oracle sql tuning-advanced" video tutorial training. www.dbvidya.com/course/sql-tuning-advanced/ [email protected] +91 991 2323 000 Oracle Performance Tuning Online Training : http://www.dbvidya.com/course/performance-tuning-for-dba/ Oracle SQL Performance Tuning Training Online : http://www.dbvidya.com/course/sql-tuning-advanced/ Oracle Performance Tuning Videos Tutorial for DBA and Developers : http://www.dbvidya.com/oracle-performance-tuning-videos/ Oracle AWR Tutorial: http://www.dbvidya.com/course/oracle-awr/ Erwin Tool Online Training : http://www.dbvidya.com/course/erwin-tool/ ER Data Modeling Course : http://www.dbvidya.com/course/er-modeling/ Dimensional Modeling Training Online : http://www.dbvidya.com/course/dimensional-modeling/ Oracle Database Blogs : http://www.dbvidya.com/blog/
Views: 129 DbVidya
Hints and Tips - SQL*Plus tricks
 
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It's been around forever... but that does not make it obsolete. Here's how you can get the most out of SQL*Plus ========================================­­============== Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 3227 Connor McDonald
Calculate query performance with Explain Plan in Oracle PLSQL.
 
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Explain plan is a wonderful utility in Oracle PL SQL. It helps you to understand how much cost a query takes to perform based on indexed table or table without index. In this oracle tutorial a full description is given on a table containing huge number of rows first based on index on a column and then without index.
Views: 3699 Subhroneel Ganguly
SQL: Optimizer Hints Part-3
 
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In this tutorial, you'll learn...what are optimizer hints and how to use it.. SQL (pronounced "ess-que-el") stands for Structured Query Language. SQL is used to communicate with a database. According to ANSI (American National Standards Institute), it is the standard language for relational database management systems.
Views: 10301 radhikaravikumar
AskTOM TV - The SQL Plus hash command
 
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A video to help you understand the "thought process" behind answering AskTom questions. In this episode, we talk about the hash (#) command for SQL Plus. blog: https://connor-mcdonald.com
Views: 668 Connor McDonald
SQL tutorial 51: DECODE function in Oracle Database By Manish Sharma (RebellionRider)
 
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SQL Tutorial 51 Decode function in Oracle Database. ● What Is DECODE() ● DECODE ( ) vs CASE ● Syntax of DECODE() ● Query 1. String Matching using DECODE() ● Query 2. DECODE() comparing values form the COLUMN of the table Celebrating 1000 subscribers. Thanks a lot guys for all your love and support. ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog: ------------------------------------------------------------------------- Copy Cloud referral link || Use this link to join copy cloud and get 20GB of free storage https://copy.com?r=kb4rc1 -------------------------------------------------------------------------- ►Make sure you SUBSCRIBE and be the first one to see my videos! -------------------------------------------------------------------------- Amazon Wishlist: http://bit.ly/wishlist-amazon ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ►►►Find me on Social Media◄◄◄ Follow What I am up to as it happens on https://twitter.com/rebellionrider https://www.facebook.com/imthebhardwaj http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ http://rebellionrider.tumblr.com/ http://www.pinterest.com/rebellionrider/ You can also Email me at [email protected] Please please LIKE and SHARE my videos it makes me happy. Thanks for liking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com ♥ I LOVE ALL MY VIEWERS AND SUBSCRIBERS
Views: 33866 Manish Sharma
Oracle 12C New Feature Listagg function improvements
 
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oracle 12c new features Queries used in the video are given in the blog link http://easy-learning-tech.blogspot.in/2018/04/oracle-12c-new-feature-listagg-function.html oracle 12c new features for developers
Views: 643 Siva Academy
Oracle : Ntile function
 
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Ntile function's detailed explaination... Oracle tutorials... easy to learn for the biginners.
Views: 279 CONNECT TO LEARN
Oracle Partition By clause, Oracle Analytic Functions tutorial
 
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More about analytic functions, visit http://www.learn-with-video-tutorials.com Oracle Analytic Functions and Over By Partition clause enable calculating cumulative and moving aggregates returning multiple rows for each group.
LISTAGG function in oracle-عربي
 
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you can go my website maxvlearn.com
Views: 411 khaled alkhudari
PL/SQL tutorial 78: PL/SQL FORALL statement with INDICES OF clause in Oracle Database
 
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Checkout this latest PL/SQL tutorial on RebellionRider.com and learn what are the shortcomings of first bound clause (i.e. Lower & Upper Bound) and how we can overcome those shortcomings using INDICES OF bound clause of FORALL statement in Oracle PL/SQL by Manish Sharma. ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog: http://bit.ly/forall-3 Bolg is online but you can still learn what is a DBMS http://bit.ly/the-DBMS Previous Tutorial ► FORALL with Lower & Upper Bound https://youtu.be/z5-hSxyUrkk ►PL/SQL FOR LOOP https://youtu.be/DfAmnj2j7WI ►SELECT-INTO statement https://youtu.be/F5eMJhwmCQs ►Nested Table https://youtu.be/EUYyiFCzU0I ------------------------------------------------------------------------- ►Make sure you SUBSCRIBE and be the 1st one to see my videos! ------------------------------------------------------------------------- ►►►Find me on Social Media◄◄◄ Follow What I am up to as it happens on https://twitter.com/rebellionrider http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ ___Facebook Official Page of Manish Sharma___ https://www.facebook.com/TheRebellionRider/ ___Facebook Official Page of RebellionRider.com___ https://www.facebook.com/RebellionRider.official/ You can also Email me at for E-mail address please check the About section Please please LIKE and SHARE my videos it makes me happy. Thanks for liking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com ♥ I LOVE ALL MY VIEWERS AND SUBSCRIBERS
Views: 4634 Manish Sharma
PARTITION BY in Oracle SQL  | Oracle SQL Tutorials | By Mr.Murali
 
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PARTITION BY in Oracle SQL | Oracle SQL Tutorials | By Mr.Murali ►For Registration : https://goo.gl/r6kJbB ►Call: +91-8179191999 ► Visit Our Website: http://nareshit.in/ http://nareshit.com/ ► About NareshIT: "Naresh IT is the Best Software Training Institute for Hadoop, Salesforce, AWS, DevOps, Sprak, Data Science, Python, Tableau, RPA ,Java, C#.NET, ASP.NET, Oracle, Testing Tools, Silver light, Linq, SQL Server, Selenium, Android, iPhone, C Language, C++, PHP and Digital Marketing in Hyderabad, Chennai and Vijayawada, India which provides online and classroom training classes" ►For Registration : https://goo.gl/r6kJbB ►Call: India- 8179191999, USA- 404-232-9879 Email: [email protected] ►Our Online Training Features: 1.Training with Real-Time Experts 2.Industry Specific Scenario’s 3.Flexible Timings 4.Soft Copy of Material 5.Share Video's of each and every session. Check The Below Links: ►For Course Reg : https://goo.gl/r6kJbB ► Subscribe to Our Channel: https://goo.gl/q9ozyG ► Circle us on G+: https://plus.google.com/NareshIT ► Like us on Facebook: https://www.facebook.com/NareshIT ► Follow us on Twitter: https://twitter.com/nareshitech ► Visit Our Website: http://nareshit.in/ http://nareshit.com/
Views: 4663 Naresh i Technologies
KISS series on Analytics: 01 Ranking rows
 
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Welcome to the KISS video series. Solving problems that typically required complicated SQL in the past, that can now be easily solved with Analytic SQL syntax. In this session, we look at how to assign a rank value to rows The sample problem we'll solve is: Show me the sequence in which everyone joined our company using RANK() Scripts: https://livesql.oracle.com/apex/livesql/s/ch1tefsz0mc75pk4ix2jbfja7 Watch the entire Analytics playlist at https://www.youtube.com/playlist?list=PLJMaoEWvHwFJDyhMLCkNSSUQWw9waFkIj ========================================­­============== Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 3498 Connor McDonald
KISS series on Analytics: 07 Partition clause
 
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Welcome to the KISS video series. Solving problems that typically required complicated SQL in the past, that can now be easily solved with Analytic SQL syntax. In this session, we take our first look at the partition clause The sample problem we'll solve is: Applying ranking functions to data when it is logically grouped into sections, in this case, populations of countries by continent Scripts: https://livesql.oracle.com/apex/livesql/file/content_ERYV6B909XK196IAKLBUQIJSN.html Watch the entire Analytics playlist at https://www.youtube.com/playlist?list=PLJMaoEWvHwFJDyhMLCkNSSUQWw9waFkIj ========================================­­­============== Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 1165 Connor McDonald
A Story of Indexes and Full Table Scans: Finding All the Red Sweets Part 1
 
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"Why isn't Oracle using my index?!" is a common question people have when tuning SQL queries. In this episode Chris compares two methods for finding all the red candies from party bags he's prepared. He shows how these are like a full table scan and an index range scan. He goes on to compare the performance of these two approaches. He shows when a full table scan becomes more efficient than an index range scan and vice versa. ============================ The Magic of SQL with Chris Saxon Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 7982 The Magic of SQL
SQL Tuning with Histograms Demonstration Part 3 of 4
 
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Learn how to use Oracle Histograms! Histograms are essential ingredient of Tuning SQL in the Oracle Database. In this part of the tutorial, SkillBuilders' Oracle Certified Master John Watson describes the importance of histograms. Histograms collect essential statistics such as data skew and thus accurately predict how many rows a predicate will select. This impacts critical decisions such as join order, join method and access method. See all free Oracle Database tutorials from SkillBuilders at http://www.skillbuilders.com/free-oracle-tutorials.
Views: 1096 SkillBuilders
FIRST_VALUE, LAST_VALUE in SQL Server
 
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Click here to Subscribe to IT PORT Channel : https://www.youtube.com/channel/UCMjmoppveJ3mwspLKXYbVlg From SQL Server 2012, This feature enabled to OVER BY Windowing Functions FIRST_VALUE – Returns the First Value in an Ordered set of Values LAST_VALUE – Returns the Last Value in an Ordered set of Values In this video you can check with Simplest Example
Views: 363 IT Port
Sql server query plan cache
 
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Text version of the video http://csharp-video-tutorials.blogspot.com/2017/04/sql-server-query-plan-cache.html Slides http://csharp-video-tutorials.blogspot.com/2017/04/sql-server-query-plan-cache_12.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All SQL Server Tutorial Videos https://www.youtube.com/playlist?list=PL08903FB7ACA1C2FB All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists In this video we will discuss 1. What happens when a query is issued to SQL Server 2. How to check what is in SQL Server plan cache 3. Things to consider to promote query plan reusability What happens when a query is issued to SQL Server In SQl Server, every query requires a query plan before it is executed. When you run a query the first time, the query gets compiled and a query plan is generated. This query plan is then saved in sql server query plan cache. Next time when we run the same query, the cached query plan is reused. This means sql server does not have to create the plan again for that same query. So reusing a query plan can increase the performance. How long the query plan stays in the plan cache depends on how often the plan is reused besides other factors. The more often the plan is reused the longer it stays in the plan cache. How to check what is in SQL Server plan cache SELECT cp.usecounts, cp.cacheobjtype, cp.objtype, st.text, qp.query_plan FROM sys.dm_exec_cached_plans AS cp CROSS APPLY sys.dm_exec_sql_text(plan_handle) AS st CROSS APPLY sys.dm_exec_query_plan(plan_handle) AS qp ORDER BY cp.usecounts DESC As you can see we have sorted the result set by usecounts column in descending order, so we can see the most frequently reused query plans on the top. usecounts - Number of times the plan is reused objtype - Specifies the type of object text - Text of the SQL query query_plan - Query execution plan in XML format To remove all elements from the plan cache use the following command DBCC FREEPROCCACHE In older versions of SQL Server up to SQL Server 6.5 only stored procedure plans are cached. The query plans for Adhoc sql statements or dynamic sql statements are not cached, so they get compiled every time. With SQL Server 7, and later versions the query plans for Adhoc sql statements and dynamic sql statements are also cached. Things to consider to promote query plan reusability For example, when we execute the following query the first time. The query is compiled, a plan is created and put in the cache. Select * From Employees Where FirstName = 'Mark' When we execute the same query again, it looks up the plan cache, and if a plan is available, it reuses the existing plan instead of creating the plan again which can improve the performance of the query. However, one important thing to keep in mind is that, the cache lookup is by a hash value computed from the query text. If the query text changes even slightly, sql server will not be able to reuse the existing plan. For example, even if you include an extra space somewhere in the query or you change the case, the query text hash will not match, and sql server will not be able find the plan in cache and ends up compiling the query again and creating a new plan. Another example : If you want the same query to find an employee whose FirstName is Steve instead of Mark. You would issue the following query Select * From Employees Where FirstName = 'Steve' Even in this case, since the query text has changed the hash will not match, and sql server will not be able find the plan in cache and ends up compiling the query again and creating a new plan. This is why, it is very important to use parameterised queries for sql server to be able to reuse cached query plans. With parameterised queries, sql server will not treat parameter values as part of the query text. So when you change the parameters values, sql server can still reuse the cached query plan. The following query uses parameters. So even if you change parameter values, the same query plan is reused. Declare @FirstName nvarchar(50) Set @FirstName = 'Steve' Execute sp_executesql N'Select * from Employees where [email protected]', N'@FN nvarchar(50)', @FirstName One important thing to keep in mind is that, when you have dynamic sql in a stored procedure, the query plan for the stored procedure does not include the dynamic SQL. The block of dynamic SQL has a query plan of its own. Summary: Never ever concatenate user input values with strings to build dynamic sql statements. Always use parameterised queries which not only promotes cached query plans reuse but also prevent sql injection attacks.
Views: 24222 kudvenkat
Oracle 11g Online Training: Free Demo on Oracle 11g Training - Oracle 11g Job Oriented Training
 
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Oracle 11g Online Training: Free Demo on Oracle 11g Training - Oracle 11g Job Oriented Training Subscribe to OPTGHAR Online IT Training and Placements at: https://www.youtube.com/channel/UCBGjmPr7EXF0GZmhw4isicA?sub_confirmation=1 Watch more demo videos at: https://www.youtube.com/channel/UCBGjmPr7EXF0GZmhw4isicA Apply for Oracle 11g DBA online training at: http://www.optghar.com/it-training-courses/oracle-11g-online-training-placement-opt-cpt-students/43/20 For more information contact OPTGHAR.com at: 844-678-4427 (844-OPTGHAR) | [email protected] | http://www.optghar.com Oracle 11g – SQL & PL/SQL The Oracle database environment 1.Reviewing basic architecture concepts 2.Oracle 10g Architecture 3.Main features of 9i and 10g Basic SQL*PLUS commands 1.Using script files, START, @, GET, SAVE, LIST, PROMPT, PAUSE, ACCEPT, DEFINE, SPOOL Basic SELECT Statement 1.Writing the statement in sql plus, Running the SELECT statement Ordering the output 1.Single Column, Descending order, multiple column sorts Conditional retrieval of data 1.Working with complex conditions, AND OR NOT LIKE BETWEEN Working with variables 1.Creating and using variables, Command substitution Pseudo columns and functions 1.Pseudo Columns, Row num, Sys date, User & UID, the Dual Table 2.Working with character functions 3.UPPER, LOWER, INITCAP, RPAD(), RTRIM(), SUBSTR(), INSTR(), 4.TRANSLATE(), REPLACE(), GREATEST(), LEAST(), DECODE 5.Working with date functions 6.TO_CHAR(), TO_DATE(), MONTHS_BETWEEN(), ADD_MONTHS(), LAST_DAY(), NEXT_DAY() Using non-character function 1.ROUND (), TRUNC (), SIGN (), Working with multiple tables, Different type of Joins, Writing Outer Joins Using the SET operators 1.Union, Intersect, minus Aggregating data using group functions 1.GROUP BY, HAVING Creating Sub queries 1.Single Row sub queries, Multiple row Sub queries Enhancing groups function 1.ROLLUP, CUBE Transaction Control Language 1.Rollback, Commit, save point Processing hierarchies 1.creating the Tree structure, LEVEL, CONNECT BY Data Manipulation Language 1.INSERT, UPDATE, DELETE Data Definition Language 1.CREATE, TRUNCATE, ALTER, DROP, RENAME, DESCRIBE Using Declarative Constraints 1.Views, Sequences, Synonyms, Indexes, USER_TABLES, USER_TAB_COLUMNS, USER_OBJECTS, USER_IND_COLUMNS, USER_UPDATEABLE_COLUMNS, Materialized Views, Other Data dictionary views Database Security 1.Object Privileges, Granting access to objects Improving query performance 1.Planning and managing the tuning process, Employing tuning tools, Running EXPLAIN PLAN and auto trace, SQL Trace and TKPROF output, Optimizer concepts, Fundamentals of access paths, Gathering object and system statistics with DBMS_STATS, Utilizing hints and optimizer mode, Specifying first-rows optimization, Determining the driving table Other Concepts 1.The Relational Database Model, The system Development Lifecycle, Overview of normalization PL/SQL Blocks 1.Structure, Writing Anonymous Blocks Variables 1.Oracle Data types, TYPE and ROWTYPE declarations, Value assignments Control structures 1.IF ELSE ENDIF statement, IF ELSIF ELSE ENDIF statement, 2.LOOP END , LOOP statement, WHILE condition, FOR condition Cursors 1.Implicit and Explicit Cursors, Cursor Manipulation statements, 2.OPEN FETCH CLOSE EXIT WHEN Printing Values to Screen Procedures 1.Creating and Calling Procedures Functions 1.Creating and Calling Functions Packages 1.Package Header, Package Body Design Tips and Techniques 1.Format of standard packages in an application, Spec and Body, NOCOPY hint Triggers 1.Database triggers, calling procedures from triggers Dynamic SQL 1.EXECUTE IMMEDIATE, DBMS_SQL package Oracle Supplied packages 1.DBMS_OUTPUT, UTL_FILE Collection data types 1.Associative Arrays, Nested tables, VARRAYs Oracle 11g Online Training: Free Demo on Oracle 11g Training - Oracle 11g Job Oriented Training Subscribe to OPTGHAR Online IT Training and Placements at: https://www.youtube.com/channel/UCBGjmPr7EXF0GZmhw4isicA?sub_confirmation=1 Watch more demo videos at: https://www.youtube.com/channel/UCBGjmPr7EXF0GZmhw4isicA Apply for Oracle 11g DBA online training at: http://www.optghar.com/it-training-courses/oracle-11g-online-training-placement-opt-cpt-students/43/20 For more information contact OPTGHAR.com at: 844-678-4427 (844-OPTGHAR) | [email protected] | http://www.optghar.com
Oracle SQL Tuning - Data Warehouse Star Transformations, Even with Standard Edition!
 
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Joining large tables in a Data Warehouse will often generate star transformations in the execution plan. So, what is a star transformation? And, what if you don't have Enterprise Edition - so you can't build Bitmap Indexes? In this free tutorial, Oracle Master John Watson will demonstrate star transformations in EE and how to make them work even without bitmap indexes - Standard Edition can save you thousands in licensing fees! This is Part 3 of a 5 Part series. View all video tutorials at SkillBuilders.com/EqualSQL.
Views: 4568 SkillBuilders
Performance Anti-Patterns: Non-query DML inside loops
 
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Lots of code follows patterns. Some of the patterns are good ones, some them are bad - and these we call "anti-patterns." In this video, Steven identifies a common and, for many, surprising anti-pattern - and then shows how to turn it into a design pattern worthy of use. The anti-pattern is the execution on non-query DML (inserts, updates, deletes) inside a loop. The refactored positive design is based on bulk processing in PL/SQL. Along the way, Steven shows how this involves moving from row-by-row to phased processing. ================================================== Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
What Impact Do Indexes Have on Inserts?: Finding All the Red Sweets Part 0
 
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Creating indexes can improve query performance. Oracle must maintain the indexes however. This increases the work it must do whenever you modify data in indexed columns. In this video Chris looks at this overhead using a real world analogy - recording the color of all the candies stored in party bags! ============================ The Magic of SQL with Chris Saxon Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 2661 The Magic of SQL
What is LAG Function in Oracle
 
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What is LAG Function in Oracle How to Get Previous Record in SQL How to Get Previous Salary in Oracle SQL Tutorial SQL Tutorial for beginners PLSQL Tutorial PLSQL Tutorial for beginners PL/SQL Tutorial PL SQL Tutorial PL SQL Tutorial for beginners PL/SQL Tutorial for beginners Oracle SQL Tutorial
Views: 281 TechLake
Pl/sql Best Practices,Performance Tuning,Database best Practices
 
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This video will show best practices for Pl/sql and SQL.It shows performance tuning guidelines for Pl/sql and database.
Views: 341 Ashwani pandey
Oracle Partition By clause, Oracle Analytic Functions tutorial
 
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Oracle Analytic Functions and Over By Partition clause enable calculating cumulative and moving aggregates returning multiple rows for each group
Oracle Tuning Tutorial - Long Full Table Scans Part 2 of 5
 
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See all 5 tutorials, free, at SkillBuilders.com/OracleTuningFullTableScans Number Eight in the "Performance tuning Guide, Top Ten Mistakes Found in Oracle Systems" Long Full Table Scans is described as follows: "Long full table scans for high-volume or interactive online operations could indicate poor transaction design, missing indexes, or poor SQL optimization. Long table scans, by nature, are I/O intensive and unscalable." Actually, there are many cases where the full table scan is your friend. But whether they are good or bad for the performance of the SQL that invokes them, there may be implications (for better or for worse) for performance of other statements. This is particularly true in 11.2.x, where direct reads are possible for serial scans, and indirect reads are possible for parallel scans. Do you trust the optimizer? The change in behaviour in recent releases may need some investigation, and revisiting older code. As always with a SkillBuilders Tutorial, we shall illustrate the issues and solutions with live demonstrations using release 11g (11.2.0.3). Audience: Operating System Administrators, Storage Administrators, Oracle Administrators and Management responsible for Storage and / or Oracle Databases.
Views: 4542 SkillBuilders
Welcome to the KISS (Keep It Simply SQL) Analytics series
 
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Welcome to the KISS video series. Solving problems that typically required complicated SQL in the past, that can now be easily solved with Analytic SQL syntax ========================================­­============== Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 5063 Connor McDonald
Tutorial#73 How to Rename Multiple Columns in Single Query in Oracle SQL Database
 
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Explaining how to alter/Rename columns in Single Query of oracle database, this can be the interview question for Oracle SQL follow me on: Facebook Page: https://www.facebook.com/LrnWthr-319371861902642/?ref=bookmarks Contacts Email: [email protected] Instagram: https://www.instagram.com/equalconnect/ Twitter: https://twitter.com/LrnWthR #Oracle #equalConnectCoach #rakeshmalviya
Views: 32 EqualConnect Coach
KISS series on Partitioning: 02 Partitioning for Performance
 
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Welcome to the KISS video series on Partitioning, where we take a more developer-centric look at how partitioning can make our applications more successful. In this session, we take a first look at why partitioning can be a great help for faster queries blog: https://connor-mcdonald.com ========================================­­============== Copyright © 2017 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 852 Connor McDonald
KISS series on Analytics: 13 FIRST_VALUE / LAST_VALUE in WINDOWS
 
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Welcome to the KISS video series. Solving problems that typically required complicated SQL in the past, that can now be easily solved with Analytic SQL syntax. In this session, we look at discovering the boundary values as defined by a WINDOW The sample problem we'll solve is: Compare life expectancy through the ages, with boundary value 5 years either side of the current value. Scripts: https://livesql.oracle.com/apex/livesql/file/content_CTQ60ECMLQDBA256F79UY1YZ5.html Watch the entire Analytics playlist at https://www.youtube.com/playlist?list=PLJMaoEWvHwFJDyhMLCkNSSUQWw9waFkIj ========================================­­­­­============== Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 1065 Connor McDonald
KISS series on Analytics: 08 Partition clause with aggregation
 
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Welcome to the KISS video series. Solving problems that typically required complicated SQL in the past, that can now be easily solved with Analytic SQL syntax. In this session, we combine partitioning with the first look at the aggregation functions available The sample problem we'll solve is: How to do a running total with analytics Scripts: https://livesql.oracle.com/apex/livesql/file/content_CPWDPU6R5I13KQG8EFUO5OPPZ.html Watch the entire Analytics playlist at https://www.youtube.com/playlist?list=PLJMaoEWvHwFJDyhMLCkNSSUQWw9waFkIj ========================================­­­============== Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 1060 Connor McDonald
KISS series on Partitioning: 01 Our first partitioned table
 
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Welcome to the KISS video series on Partitioning, where we take a more developer-centric look at how partitioning can make our applications more successful. In this session, we look at how to create our very first range partitioned table Scripts: https://livesql.oracle.com/apex/livesql/file/content_EM2X7EIHU60Z888IOU53RF0EN.html ========================================­­============== Copyright © 2017 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 1164 Connor McDonald
Oracle Tutorial || Online Training || Adv Sql | Index Organized Table Part - 1 by basha
 
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DURGASOFT is INDIA's No.1 Software Training Center offers online training on various technologies like JAVA, .NET , ANDROID,HADOOP,TESTING TOOLS ,ADF,INFORMATICA,TABLEAU,IPHONE,OBIEE,ANJULAR JS, SAP... courses from Hyderabad & Bangalore -India with Real Time Experts. Mail us your requirements to [email protected] so that our Supporting Team will arrange Demo Sessions. Ph:Call +91-8885252627,+91-7207212428,+91-7207212427,+91-8096969696. http://durgasoft.com http://durgasoftonlinetraining.com https://www.facebook.com/durgasoftware http://durgajobs.com https://www.facebook.com/durgajobsinfo......
KISS series on Analytics: 26  Hypothetical analytics and ratios
 
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Welcome to the KISS video series. Solving problems that typically required complicated SQL in the past, that can now be easily solved with Analytic SQL syntax. In this session, look at how even when data is not present, we can use analytics to get hypothetical results. For example, we can answer the question: "If an employee's salary was $1000, where would they sit within each department" Script: https://livesql.oracle.com/apex/livesql/file/content_DBCCAWYD3M9R9SVS21SUGK1Q5.html ========================================­­­­============== Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 493 Connor McDonald
MSPTDA 11.5 Which Power Query Steps Are Used in SQL Query Folding? “View Native Query” feature!
 
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Download Excel FINISHED File: https://people.highline.edu/mgirvin/AllClasses/348/MSPTDA/Content/PowerQuery/011-MSPTDA-ImportSQLIntoPowerQuery-Finished.xlsx Download Power BI Desktop FINISHED File: https://people.highline.edu/mgirvin/AllClasses/348/MSPTDA/Content/PowerQuery/011-MPSTDA-PowerBIDesktop-GetSQL-Data.pbix Download pdf Notes about Power Query: https://people.highline.edu/mgirvin/AllClasses/348/MSPTDA/Content/PowerQuery/011-MSPTDA-PowerQueryImportSQLData.pdf In this Video discusses the new “View Native Query” feature in Power BI Desktop Power Query and Office 365 Excel Power Query to determine which of the Applied Steps are sent back to the SQL Server Database as part of Query Folding. Comprehensive Microsoft Power Tools for Data Analysis Class, BI 348, taught by Mike Girvin, Excel MVP and Highline College Professor.
Views: 3636 ExcelIsFun
Oracle 11g New Features : SQL Plan Management  (Baselining)
 
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Oracle 11g SQL Plan Management, a.k.a. Baselining, will solve the major issues of change control. We can give you an absolute guarantee - if you configure this as part of your upgrade - that SQL statement execution (performance) will never regress. You may also like our new and free Oracle 12c video tutorials, https://www.skillbuilders.com/free-oracle-database-tutorials . This tutorial is particularly relevant: it provides a review of baselining then reveals 12c performance features https://www.skillbuilders.com/free-oracle-database-tutorials/oracle-12c-sql-performance-features-agenda-session/
Views: 10222 SkillBuilders
Finding First Day Of The Month SQL Server
 
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Published on Aug 19, 2017: In this video tutorial, we will learn to find the first day of the month for any given date in SQL server. You can use the below SQL to get the first day of the month. Declare @myDate date=getdate() Select Cast(Cast(Month(@MyDate) as varchar)+'-'+'01-'+Cast(Year(@MyDate) as varchar) as Date) StartOfMonth --Steps --Get the month from the date --The first date of the month is '01' replace 01 with the day --Get the Year from the date --Recreate the date string --Cast the new string to a date. Previous Video:https://youtu.be/xG1ynC5Yo-o SUBSCRIBE to learn more about Power BI,Power Query, Power Pivot, Excel and SQL Server! https://www.youtube.com/channel/UCYYHFZpm5GbaOmQKDNSTGLw Download the sample database used for the demo here: https://goo.gl/SVyVmT Our Playists: SQL Playlist :https://goo.gl/PS5Ep6 DAX PlayList : https://goo.gl/S4W41D Power BI PlayList: https://goo.gl/dXxvnB Power Query Playlist: https://goo.gl/5QS7P4 ABOUT DAGDOO: Website: Home Page: http://www.dagdoo.org/ Power BI Tutorials: http://www.dagdoo.org/excel-learning/tutorial-power-bi-desktop/ Questions? Comments and SUGESTIONS? You will find me here: Twitter: @dagdooe Category: Science & Technology License: Standard YouTube License
Views: 458 Learn 2 Excel
Cary Millsap: Performance is a Feature
 
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To many people who build and run software, "performance" is a side-effect, an afterthought of designing and building "proper" features like buttons that book orders and reports that explain profitability. But great performance at scale doesn't happen by accident. The first step to great performance is to remember what performance is: it is the answer to the question, "What have people been experiencing?" Knowing what people experience when they use your software is possible only if you treat performance as a proper feature--a feature you analyze, design, build, test, and maintain. This session for system owners, users, designers, developers, and DBAs discusses performance in terms that everyone can understand. It explains why so many in the Oracle ecosystem have lost sight of the basic notion that performance is an attribute of the end-user experience. It explains how performance should really be measured, and it explains the steps that will get you started. A live Q&A session with Cary Millsap follows the presentation.
Views: 2445 Redgate Videos
KISS on 12c: The best code is no code
 
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Want to ditch a whole bundle of triggers on your system ? 12c improvements to defaults might just be the way. ========================================­­­­============== Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 568 Connor McDonald
8 Key Tips To Remember | Matillion ETL
 
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In this video we cover a few hints and tips that long-term users may have missed within Matillion ETL. Start a Free Trial of Matillion ETL for Amazon Redshift: https://www.matillion.com/etl-for-redshift/free-trial/ More information: Matillion: https://www.matillion.com/ Start a Free Trial of Matillion ETL for Amazon Redshift: https://www.matillion.com/etl-for-redshift/free-trial/ Matillion ETL Support Center: Amazon Redshift: https://redshiftsupport.matillion.com/ Google BigQuery: https://bigquerysupport.matillion.com/ Snowflake: https://snowflakesupport.matillion.com/ Matillion ETL for Amazon Redshift: https://www.matillion.com/etl-for-redshift/etl-redshift/ Matillion ETL for Google BigQuery: https://www.matillion.com/etl-for-bigquery/etl-bigquery/ Matillion ETL for Snowflake: https://www.matillion.com/etl-for-snowflake/etl-snowflake/ Community: Twitter: https://twitter.com/matillion Blog: https://www.matillion.com/community/ Subscribe: https://www.youtube.com/subscription_center?add_user=MatillionVideos
Views: 510 Matillion
How to create Virtual Columns in Oracle Database
 
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How to create Virtual Columns in Oracle Database 12c When queried, virtual columns appear to be normal table columns, but their values are derived rather than being stored on disc. The syntax for defining a virtual column is listed below. column_name [datatype] [GENERATED ALWAYS] AS (expression) [VIRTUAL] If the datatype is omitted, it is determined based on the result of the expression. The GENERATED ALWAYS and VIRTUAL keywords are provided for clarity only. The script below creates and populates an employees table with two levels of commission. It includes two virtual columns to display the commission-based salary. The first uses the most abbreviated syntax while the second uses the most verbose form. CREATE TABLE employees ( id NUMBER, first_name VARCHAR2(10), last_name VARCHAR2(10), salary NUMBER(9,2), comm1 NUMBER(3), comm2 NUMBER(3), salary1 AS (ROUND(salary*(1+comm1/100),2)), salary2 NUMBER GENERATED ALWAYS AS (ROUND(salary*(1+comm2/100),2)) VIRTUAL, CONSTRAINT employees_pk PRIMARY KEY (id) ); INSERT INTO employees (id, first_name, last_name, salary, comm1, comm2) VALUES (1, 'JOHN', 'DOE', 100, 5, 10); INSERT INTO employees (id, first_name, last_name, salary, comm1, comm2) VALUES (2, 'JAYNE', 'DOE', 200, 10, 20); COMMIT; Querying the table shows the inserted data plus the derived commission-based salaries. SELECT * FROM employees; ID FIRST_NAME LAST_NAME SALARY COMM1 COMM2 SALARY1 SALARY2 ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- 1 JOHN DOE 100 5 10 105 110 2 JAYNE DOE 200 10 20 220 240 2 rows selected. SQL The expression used to generate the virtual column is listed in the DATA_DEFAULT column of the [DBA|ALL|USER]_TAB_COLUMNS views. COLUMN data_default FORMAT A50 SELECT column_name, data_default FROM user_tab_columns WHERE table_name = 'EMPLOYEES'; COLUMN_NAME DATA_DEFAULT ------------------------------ -------------------------------------------------- ID FIRST_NAME LAST_NAME SALARY COMM1 COMM2 SALARY1 ROUND("SALARY"*(1+"COMM1"/100),2) SALARY2 ROUND("SALARY"*(1+"COMM2"/100),2) 8 rows selected. SQL Notes and restrictions on virtual columns include: 1)Indexes defined against virtual columns are equivalent to function-based indexes. 2)Virtual columns can be referenced in the WHERE clause of updates and deletes, but they cannot be manipulated by DML. 3)Tables containing virtual columns can still be eligible for result caching. 4)Functions in expressions must be deterministic at the time of table creation, but can subsequently be recompiled and made non-deterministic without invalidating the virtual column. In such cases the following steps must be taken after the function is recompiled: a)Constraint on the virtual column must be disabled and re-enabled. b)Indexes on the virtual column must be rebuilt. c)Materialized views that access the virtual column must be fully refreshed. d)The result cache must be flushed if cached queries have accessed the virtual column. e)Table statistics must be regathered. 5)Virtual columns are not supported for index-organized, external, object, cluster, or temporary tables. 6)The expression used in the virtual column definition has the following restrictions: a.It cannot refer to another virtual column by name. b.It can only refer to columns defined in the same table. c.If it refers to a deterministic user-defined function, it cannot be used as a partitioning key column. e.The output of the expression must be a scalar value. It cannot return an Oracle supplied datatype, a user-defined type, or LOB or LONG RAW.
Views: 458 OracleDBA
KISS series on Partitioning: 09 Interval partition idiosyncracies
 
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Welcome to the KISS video series on Partitioning, where we take a more developer-centric look at how partitioning can make our applications more successful. In this session, we look at converting some things to keep in mind when dealing with interval partitioned tables Scripts: https://livesql.oracle.com/apex/livesql/file/content_FCVIVNV6YDS2FT920MW3CD0LZ.html blog: https://connor-mcdonald.com ========================================­­============== Copyright © 2017 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 305 Connor McDonald
1Z0-419 - Oracle Test Application Exam Development Questions
 
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For Oracle 1Z0-419 Test Questions and Answers Please Visit: https://www.PassEasily.com/1Z0-419.htm Exam Section 1 – Exposing Data to Clients Questions (Test Coverage 18%) Exam Section 2 – Validating User Input Questions (Test Coverage 20%) Exam Section 3 – Responding to Application Events Questions (Test Coverage 21%) Exam Section 4 – Debugging and Deploying ADF Applications Questions (Test Coverage 20%) Exam Section 5 – Building Reusability Into Pages Questions (Test Coverage 21%) (Exam Time) : 120 minutes (Number of Test Questions): 87 (1Z0-419 Passing Score): 63% 1. Introduction to JDeveloper and ADF •Explain how ADF fits into the test Fusion architecture •Describe the ADF technology stack exam (MVC) for 1Z0-419 •Create applications, projects, and connections in JDeveloper •Describe how ADF is used in building questions Mobile applications 2. Building a Data Model with ADF Business Components •Describe the exam characteristics of an entity object •Describe the test characterisitics of a view object •Describe the questions characterisitics of an application module •Define a SQL statement on which to base a query for a view object •Describe the persistence test mechanism of entity objects for 1Z0-419 •Use the wizard to generate exam entity objects from database tables •Create updatable view objects based on entity objects •Link view objects to one questions another in a master-detail hierarchy 3. Exposing Data to Clients •Declaratively define the data model for an application module •Explain how application modules test can manage application state •Create nested application modules and understand transaction considerations •Create web service interfaces for exam application modules •Explain ADF BC questions transaction handling for 1Z0-419 4. Creating Views with ADF Faces •Define JavaServer Faces (JSF) and the component exam architecture •Describe the purpose of backing beans •Identify ADF component types included in the ADF Faces test component library •Explain the purpose of a data control for 1Z0-419 •Explain what stretch and flow questions components are and describe how to use them effectively •Define and use complex test layout components 5. Defining Task Flows and Adding Navigation •Explain how ADF extends capabilities of JSF controller •Create task flows to define exam control flow in an application for 1Z0-419 •Explain how managed questions beans are used in an application 6. Declaratively Customizing Business Components •Modify the default behavior test of view objects declaratively •Modify the default behavior of entity exam objects declaratively •Define a list of values (LOV) for an attribute •Create a transient attribute for 1Z0-419 •Define control hints questions for entity object attributes 7. Validating User Input •Describe the exam types of validation available for ADF applications •Add declarative test validation for an entity object •Write Groovy questions expressions in validation for 1Z0-419
Views: 376 Pass Oracle Easily
Batch Mode Hacks in SQL Server (Dear SQL DBA Episode 42)
 
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Learn what batch mode is in SQL Server, and how you can trick SQL Server into using it (even without a "real" columnstore index). For code samples and links: https://sqlworkbooks.com/2017/05/batch-mode-hacks-for-rowstore-queries-in-sql-server/
Views: 621 SQL Workbooks
DB2 for z/OS Best Practice: Optimizing Insert Performance Part 2
 
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This second webcast on optimizing insert performance reviews additional techniques for speeding up the process of inserting rows into DB2. Learn about methods such as using a large index pagesize, random index keys, removing unused indexes, logging, and efficiently creating unique identifiers. The webcast covers enhancements specific to DB2 10 (such as index I/O parallelism, unique index with INCLUDE, and in-line LOBs) that impact insert performance. Finally, the presenter summarizes the best practices from both part 1 and part 2.
Views: 819 World of Db2
Informatica interview questions and answers-Part8
 
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Informatica interview questions and answers-Part8, informatica interview questions and answers, informatica scenario based questions, informatica performance tuning questions, informatica online training, online informatica training, informatica interview preparation, informatica interview questions and answers for experienced, informatica interview questions and answers for 2 years experienced, informatica interview questions and answers for 3 years experienced, informatica interview questions and answers for 7 years experienced
Views: 624 Venkat KS

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