MySQL创建视图命令

CREATE ALGORITHM = UNDEFINED
DEFINER = `root`@`localhost`
SQL SECURITY DEFINER
VIEW girl_users_view AS
(SELECT g.id,g.age,g.size,g.city_type,g.`name`,u.username,u.nickname FROM users u INNER JOIN girl g ON g.id=u.id)

几点说明（MySQL中的视图在标准SQL的基础之上做了扩展）：

ALGORITHM=UNDEFINED：指定视图的处理算法；

DEFINER=`root`@`localhost`：指定视图创建者；

SQL SECURITY DEFINER：指定视图查询数据时的安全验证方式；

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修改视图

ALTER ALGORITHM = UNDEFINED
DEFINER = `root`@`localhost`
SQL SECURITY DEFINER
VIEW girl_users_view AS
(SELECT g.age,g.size,g.city_type,g.`name`,u.username,u.nickname FROM users u INNER JOIN girl g ON g.id=u.id)