SQL Server Execution Plans - eBook

"Every day, out in the various SQL Server forums, the same types of questions come up again and again: why is this query running slow? Why isn't my index getting used? And on and on. In order to arrive at the answer you have to ask the same return question in each case: have you looked at the execution plan?"

Grant Fritchey, Author.

Author profile: Grant Fritchey

Grant is a database administrator for a major insurance company. He has 18 years experience in IT including time spent in support and development. He has been working with SQL Server since 6.0 back in 1995. he worked with Sybase for a few years. He has developed in VB, VB.Net, C# and Java. He is currently working on methods for incorporating Agile development techniques into database design and development at his company.

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http://www.simple-talk.com/sql/performance/sql-server-execution-plans---ebook-download/

（注：需要注册才可以下载，这里下载到的是完整版）