1. Why we need the index 'include' feature? For SQLServer , the length of all the index key have a limit length as 900 byte. when you create a index whose keys' total length may exceced 900 byte , such as below CREATE TABLE GPCUSTEXT( CUSTNO nvarchar…

http://www.cnblogs.com/tintown/archive/2005/04/24/144272.html http://coolshell.cn/ http://blogs.msdn.com/b/bartd/archive/2006/09/25/770928.aspx…

最近在进行数据库调优,对索引的使用和其内部的运转一知半解.在园子里看到一篇相关文章非常好.留下印记以便日常查找. http://www.cnblogs.com/xwdreamer/archive/2012/07/06/2579504.html…

0.参考文献 Table Scan, Index Scan, Index Seek SQL SERVER – Index Seek vs. Index Scan – Diffefence and Usage – A Simple Note oracle表访问方式 Index Seek和Index Scan的区别以及适用情况 1.oracle中的表访问方式 在oracle中有表访问方式的说法,访问表中的数据主要通过三种方式进行访问: 全表扫描(full table scan),直接访问数据页,查找…

Complete list of Microsoft SQL Server trace flags (585 trace flags) REMEMBER: Be extremely careful with trace flags, test in your test environment first. And consult professionals first if you are the slightest uncertain about the effects of your cha…

http://sqlserverbuilds.blogspot.jp/   What version of SQL Server do I have? This unofficial build chart lists all of the known Service Packs (SP), Cumulative Updates (CU), patches, hotfixes and other builds of MS SQL Server 2016, 2014, 2012, 2008 R2,…

P6 Professional Installation and Configuration Guide (Microsoft SQL Server Database) 16 R1       May 2016 Contents About This Guide...................................................................................... 11 Shared Topics in This Guide .…

小小程序猿SQL Server认知的成长 1.没毕业或工作没多久,只知道有数据库.SQL这么个东东,浑然分不清SQL和Sql Server Oracle.MySql的关系,通常认为SQL就是SQL Server 2.工作好几年了,也写过不少SQL,却浑然不知道索引为何物,只知道数据库有索引这么个东西,分不清聚集索引和非聚集索引,只知道查询慢了建个索引查询就快了,到头来索引也建了不少,查询也确实快了,偶然问之:汝建之索引为何类型?答曰:... 3.终于受到刺激开始奋发图强,买书,gg查资料终于知道…

转载自:http://technet.microsoft.com/en-us/magazine/gg299551.aspx Many companies have downsized their IT departments over the last few years. Many database administrators (DBAs) have ended up with responsibility for large numbers of SQL Server databases.…

时间 2014-10-02 00:00:00 SQL Server Team Blog   原文  http://blogs.technet.com/b/dataplatforminsider/archive/2014/10/01/sql-server-2008-r2-sp3-and-sql-server-2008-sp4-are-now-available.aspx 主题 SQL Server SQL Microsoft is pleased to announce the release o…