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分析SQL Server 给出的missing index建议

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Release： 2016-06-07 17:37:01
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测试基于SQLServer2008AdventureWorks2008,TablePerson.Person.表中已经存在的索引定义：CREATENONCLUSTEREDINDEX[IX_Person_LastName_FirstName_MiddleName]ON.

 

测试基于SQL Server 2008  AdventureWorks2008,TablePerson.Person.表中已经存在的索引定义：

 

 

 

 [ix1]

 [ix_firstname]

go


所以即使SQL Server给出的Missing Index 也要最好分析之后进行使用。创建Index之后要关注Index的使用状况，比如Seek/Scan/Lookup/Update的比例，根据这些数据，进行相应的调整。因为对于更新多而查询非常少的案例，创建多的索引可能会在造成负担。

 

 

 

 

本文出自 “关注SQL Server技术” 博客，请务必保留此出处

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