Tag: sql

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SQL Server Query Tuning Best Practices – Part 1

Added by 5 years ago

11.39K Views1 Comments

SQL Server MVPs Aaron Bertrand and Kevin Kline begin their series on query tuning best practices. They go over some tips and tricks for writing queries. First, Kevin spends a little time on how to approach your ...

SQL Server Query Tuning Best Practices – Part 2

Added by 5 years ago

4.99K Views1 Comments

SQL Server MVPs Aaron Bertrand and Kevin Kline continue their series on query tuning best practices. Kevin starts by talking about what you should include in test harnesses for testing your SQL code and how to i...

Specifying the Schema

Added by 4 years ago

3.53K Views1 Comments

Aaron Bertrand and Kevin Kline discuss some of the advantages for specifying the schema when creating, altering and referencing objects. They discuss how specifying a schema can affect performance and how important it is for security. They also use demos to illustrate the importance.

The Dreaded SP_ Prefix

Added by 4 years ago

3.60K Views1 Comments

Aaron Bertrand explains what the SP_ prefix is and discusses the performance issues with using it when you call a stored procedure. He also mentions a blog post he wrote about the SP_ prefix, which can be found at SQLPerformance.com/sp_prefix.

To MERGE or not to MERGE

Added by 5 years ago

3.16K Views0 Comments

Aaron Bertrand discusses the issues of using the MERGE statement. He also gives a few ways to avoid using it.

Plan Explorer Demo by Jonathan Kehayias (SQLskills)

Added by 6 years ago

4.06K Views0 Comments

Plan Explorer takes plan analysis to an entirely new level by making it easy to snap to the most expensive operator inside of an execution plan, change the default display to show cumulative costs instead of per...

Execution Plan Self-Destruct

Added by 5 years ago

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Kevin Kline discusses how SQL Server wants to reuse execution plans but there are issues that can cause execution plans to never be reused. He also shares some examples of how to fix these issues which will help improve SQL Server performance.

Temporary Structures

Added by 5 years ago

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Kevin Kline discusses how the two types of temporary objects behave. He also shares some information on what they are good at and what they are not good at.

Queries with IN(…) / OR

Added by 4 years ago

4.64K Views0 Comments

In this Quick Tip, Aaron Bertrand and Kevin Kline discuss queries that use IN(…) vs. queries that use OR. They use a demo to show how the two types of queries are interchangeable and how they both optimize to the exact same plan.

Ad-Hoc Sets

Added by 5 years ago

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Aaron Bertrand goes over how to generate Ad-Hoc Sets efficiently. He shows examples of how to generate them using recursive CTEs, system tables and number tables and shows which way has the best performance.

Transitive Property of Indexes

Added by 4 years ago

2.84K Views0 Comments

In this video, Kevin Kline discusses the transitive property of indexes. He starts out by discussing how the transitive property works in algebra. Then he shares how the transitive property in algebra can be applied to Microsoft SQL Server.

Comma Delimited Parameters

Added by 5 years ago

3.97K Views0 Comments

Aaron Bertrand discusses one of his favorite topics, comma-delimited parameters. He shows the different ways you can split strings and which ways are the best.

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