Tag: query tuning

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SQL Server Query Tuning Best Practices – Part 1

Added by 5 years ago

11.62K 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

5.13K 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

3.68K 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

3.72K 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.

Plan Explorer Demo by Jonathan Kehayias (SQLskills)

Added by 7 years ago

4.30K 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...

Queries with IN(…) / OR

Added by 4 years ago

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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.

Implicit Conversions

Added by 5 years ago

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Kevin Kline goes over implicit conversions in SQL Server. He discusses what an implicit conversion is, traps that people fall into with implicit conversions and gives a demo on avoiding implicit conversions. ...

Transitive Property of Indexes

Added by 4 years ago

2.94K 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.

Temporary Structures

Added by 5 years ago

2.58K Views0 Comments

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.

Getting Started With Execution Plans

Added by 4 years ago

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In this video, Scott Fallen shares tips on how to get started with execution plans. He discusses what an execution plan is and why they are important. He also walks through a couple of sample plans.

Ad-Hoc Sets

Added by 5 years ago

3.51K Views0 Comments

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.

Query Progress Tracking in SQL Server

Added by 3 years ago

3.73K Views0 Comments

It's 18:00 o'clock on Friday. You execute a process that usually takes a few minutes and start packing in order to start the weekend. You are already with your bag on your back, but the process doesn't finish. You sta...

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