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SQL server 视图（view）介绍

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Jun 07, 2016 pm 06:06 PM

serversqlview

视图是一种常用的数据库对象，它将查询的结果以虚拟表的形式存储在数据中

视图是一种常用的数据库对象，它将查询的结果以虚拟表的形式存储在数据中。因为视图有非常多的优点：1，可以简化操作，2，可以建立前台和后台的缓冲，3，可以合并分割数据，4，最重要的是可以提高安全性，因此在SQL中视图也占据着非常重要的地位。在这章的总结中，深刻体会到了，两种方法：1，企业管理器，2，T-SQL语句来管理视图，和四种操作：1，增，2,，删，3，改，4，查。

在企业管理器，也是现在的SQL server Management Studio中，来执行这些操作，其实都大同小异！例如建立视图，到视图上右击，然后新建视图，以后都有向导，都非常简答执行！

下边重点说说，用T-SQL语句来执行这些操作的总结：

在这里我举一个创建视图的例子：

例：在company数据库中创建一个视图，要求该视图返回的结果中包含信息项目名称，客户名称，员工的姓名，开始日期和预计工期。

 use company create view 项目信息视图 as select a.项目名称，b.客户名称，c.姓名，a，开始日期，a.预计工期 From project as a inner join customer as b On a.客户编号=b.客户编号 innerjoin employee as c Where a.客户编号=b.客户编号 and a.负责人编号=c.编号 go

当然我们通过视图还可以对表中的数据做一些操作：

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