SQL语法——视图创建

/*
视图
*/

/*-- 1. 定义视图

CREATE VIEW view_name [(列名[,列名]...)]
AS 子查询 [with check option]
*/

--e.g.

--定义视图compStud为计算机系的学生，通过该视图可以将student表中其他系的学生屏蔽
CREATE VIEW comStud AS
(SELECT * FROM student WHERE d# IN
(SELECT d# FROM dept WHERE dname = '计算机')
);