如何在 MySQL 中创建视图?
mysqlmysqli database
要在 MySQL 中创建视图，可以使用 CREATE VIEW 命令。语法如下 −
CREATE VIEW yourViewName as SELECT yourColumName1, yourColumName2, yourColumName3,...... yourColumNameN from yourTableName;
为了理解上述语法，让我们先创建一个表。以下是创建表的查询 −
mysql> create table ViewDemo −> ( −> Id int, −> Name varchar(200), −> Age int −> ); Query OK, 0 rows affected (0.58 sec)
执行上述语法来创建视图。以下是在 MySQL 中创建视图的查询 −
mysql> create view LookUpTable as select Id,Name from ViewDemo; Query OK, 0 rows impacted (0.15 sec)
现在使用 show 命令检查视图是否已创建。查询如下 −
mysql> show create table LookUpTable;
以下是输出 −
+-------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+ | View | Create View | character_set_client | collation_connection | +-------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+ | lookuptable | CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`%` SQL SECURITY DEFINER VIEW `lookuptable` AS select `viewdemo`.`Id` AS `Id`,`viewdemo`.`Name` AS `Name` from `viewdemo` | utf8 | utf8_general_ci | +-------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+ 1 row in set (0.00 sec)
