MySQL 如何在MySQL中创建视图？

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;

要理解上述语法，请先创建一个表。以下是创建表的查询语句－

mysql> create table ViewDemo
   −> (
   −> Id int,
   −> Name varchar(200),
   −> Age int
   −> );
Query OK, 0 rows affected (0.58 sec)

实现上述语法来创建视图。以下是在MySQL中创建视图的查询语句－

mysql> create view LookUpTable as select Id,Name from ViewDemo;
Query OK, 0 rows affected (0.15 sec)

现在使用show命令检查视图是否已创建。查询语句如下－

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)

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