Inside the SQL Server Query Optimizer(Benjamin Nevarez,2010)下载

weixin_39821051 2020-08-13 02:30:46

The SQL Server Query Optimizer is perceived by many to be a magic black box, transforming SQL queries into high performance execution plans in the blink of an eye through some unknowable process. The truth is that, while the Query Optimizer is indeed the highly-complex result of decades of research,
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The SQL Server Query Optimizer is perceived by many to be a magic black box, transforming SQL queries into high performance execution plans in the blink of an eye through some unknowable process. The truth is that, while the Query Optimizer is indeed the highly-complex result of decades of research, learning how it works its magic is not only possible, but immensely useful to database developers and administrators alike. A better understanding of what the Query Optimizer does behind the scenes can help you to improve the performance of your databases and applications, and this book explains the core concepts behind how the SQL Server Query Optimizer works. With this knowledge, you’ll be able to write superior queries, provide the Query Optimizer with all the information it needs to produce efficient execution plans, and troubleshoot the cases when the Query Optimizer is not giving you the best plan possible. With over 15 years of experience in the use of Relational Databases (including SQL Server since version 6.5), Benjamin has watched the SQL Server Relational Engine grow and evolve. His insight will leave you with an excellent foundation in the practicalities of the Query Optimizer, and everything you need to know to start tuning your queries to perfection.

本篇博文只测试WHERE谓词对multi-column index使用的影响，主要篇幅是SQL代码+截图。详细内容请参考《Inside the SQL Server Query Optimizer 》--Benjamin Nevarez，Chapter 4:Index Selection-->The Mechanics of Index Selection(Page124). ...

通过慢sql分析的学习，了解什么是慢sql，以及慢SQL会引起那些性能问题。清楚慢sql日志的设置，然后再通过慢sql分析工具的学习，清楚慢sql分析的步骤和流程。慢sql分析工具：mysqldumpslow工具、explain工具、profile...

Tips to Optimize Your SQL Statements - Part 2 By Brian Ellul, 2015/05/07 Introduction This article can be considered the second part of my previous article, Tips to optimize your SQL Stat

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