SQL Server复合索引

SQL Server创建复合索引时，复合索引列顺序对查询的性能影响

原文:SQL Server创建复合索引时，复合索引列顺序对查询的性能影响说说复合索引 写索引的博客太多了，一直不想动手写，有一下两个原因：一是觉得有炒剩饭的嫌疑，有兄弟曾说：索引吗，只要在查询条件上建索引就行了，真的可以这么暴力吗？...

SqlServer(索引)-创建复合索引时，复合索引列顺序对查询的性能影响[转]

http://www.cnblogs.com/wy123/p/5604400.htmlSQL Server创建复合索引时，复合索引列顺序对查询的性能影响说说复合索引写索引的博客太多了，一直不想动手写，有一下两个原因：一是觉得有炒剩饭的嫌疑，有兄弟曾说：索引吗，只要在查询条件...

Sql Server之旅——第八站 复合索引和include索引到底有多大区别？

原文:Sql Server之旅——第八站 复合索引和include索引到底有多大区别？周末终于搬进出租房了，装了宽带。才发现没网的日子。那是一个怎样的与世隔绝呀。再也受不了那样的日子了。好了，既然网安上去了，还得继续我的这个系列。索引和锁，...

Sql Server之旅——第八站 复合索引和include索引到底有多大区别？

当然数据库不可能只认单列索引，还有我这篇的复合索引，说到复合索引，可能熟悉的人又会说到include索引，那这两个索引到底有什么区别呢，当然我也是菜鸟一枚。所以下面的也是我的个人见解。一：从数据页角度看问题 1.做两个表，插入两条...

Sql Server之旅——第九站看公司这些DBA们设计的这些复合索引

原文:Sql Server之旅——第九站看公司这些DBA们设计的这些复合索引 这一篇再说下索引的最后一个主题，索引覆盖，当然学习比较好的捷径是看看那些大师们设计的索引，看从中能提取些什么营养的东西，下面我们看看数据库中一个核心的Orders...

Sql Server之旅——第九站看公司这些DBA们设计的这些复合索引

既然是频繁的列，肯定就要想办法优化，方法就是建复合索引，这样在复杂的sql中更加容易被撞上索引覆盖。比如下面这样：1 SET STATISTICS IO ON 2 SELECT OrderStatus,ProcessStatus,SendTicketCity,FlightAgency,Eticket,OrderID 3 FROM ...

SQL Server 执行计划利用统计信息对数据行的预估原理二（为什么复合索引列顺序会影响...

原文:SQL Server 执行计划利用统计信息对数据行的预估原理二（为什么复合索引列顺序会影响到执行计划对数据行的预估）本文出处：http://www.cnblogs.com/wy123/p/6008477.html 关于统计信息对数据行数做预估，之前写过对非相关列（单独或者...

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云数据库RDS SQL Server版

云数据库SQL Server，具有企业许可授权，权限更为开放，引擎功能更为强大。能完美支持Windows平台的.NET架构，支持复杂SQL查询，性能优秀，并有强大的可视化管理工具，帮助您轻松管理数据。

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