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Learn T-SQL Querying
book

Learn T-SQL Querying

by Pedro Lopes, Pam Lahoud
May 2019
Intermediate to advanced content levelIntermediate to advanced
484 pages
11h 23m
English
Packt Publishing
Content preview from Learn T-SQL Querying

Understanding the need for Lightweight Profiling

If you are asking yourself why you would want to know about an obscure Database Engine component named Query Profiling Infrastructure, then read on. Not many database professionals know it by name, but most have dealt with it when there's a need to troubleshoot query performance issues in a production environment. When a SQL Server performance issue hits, one of the first requirements is to understand which queries are executing and how system resources are being used. And one of the most important artifacts anyone can use to know more about queries that are executing are query plans.

Analyzing a query plan, also known as an estimated execution plan, means that we're only looking at what SQL ...

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Publisher Resources

ISBN: 9781789348811Supplemental Content