SQL online 的相关内容

文章 2022-02-16 来自：开发者社区

SQL Server以Online模式创建索引

英文原文： http://dba.fyicenter.com/faq/sql_server/CREATE_INDEX_Impact_on_Other_User_Sessions.html 如果你正在一个存在数据的表上创建新的索引，所有存在的行将会被索引作为CREATE INDEX语句的一部分。如果表非常大，索引过程将会花费些时间。索引过程对其他用户会话的影响，...

文章 2022-02-16 来自：开发者社区

Sql Server 2012特性- Online添加非空栏位

我们都知道,Sql Server在一个数据量巨大的表中添加一个非空栏位是比较费心的,缺乏经验的DBA或是开发人员甚至可能鲁莽地直接添加导致阻塞相应业务,甚至可能因为资源欠缺造成实例的全局问题.当然这都是Sql 2008R2及以前版本的情况.在SQL2012中采用了新的实现方式.这里我将对比相应的实现方式给大家做个介绍.并简单说明Sql Server早期版本添加非空列的方法. 添加非空栏位的实现方....

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更新时间 2024-10-17 18:11:05

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