Chapter 2. Common patterns

 

This chapter covers
  • Common patterns used repeatedly in code snippets
  • Calculating the differences between DMV snapshots
  • Reading cached plans

 

The core of this book will supply many ready-to-run code snippets that will give you useful information about the cause of your performance problems, show how to improve your SQL queries, and also give you a better understanding of your SQL Server.

Many of the code snippets in this book have approaches (patterns) that are used over and over again. Rather than explain the patterns repeatedly for each of the code snippets that use them, the purpose of this chapter is to explain these patterns once, in detail. Please feel free to refer back to this section if you’re unsure ...

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