MySQL 如何创建视图

要创建MySQL视图，请使用CREATE VIEW关键字，语法如下所示−

create view yourViewName as select * from yourTableName;

让我们首先创建一个表−

mysql> create table DemoTable1802
     (
     StudentId int,
     StudentName varchar(20)
     );
Query OK, 0 rows affected (0.00 sec)

使用插入命令在表中插入一些记录−

mysql> insert into DemoTable1802 values(101,'John');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1802 values(102,'Carol');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1802 values(103,'Sam');
Query OK, 1 row affected (0.00 sec)

使用select语句显示表中的所有记录−

mysql> select * from DemoTable1802;

这将产生以下输出−

+-----------+-------------+
| StudentId | StudentName |
+-----------+-------------+
|       101 | John        |
|       102 | Carol       |
|       103 | Sam         |
+-----------+-------------+
3 rows in set (0.00 sec)

这是创建视图的查询−

mysql> create view view_DemoTable1802 as select * from DemoTable1802;
Query OK, 0 rows affected (0.00 sec)

使用select语句显示视图中的所有记录−

mysql> select * from view_DemoTable1802;

这将产生以下输出−

+-----------+-------------+
| StudentId | StudentName |
+-----------+-------------+
|       101 | John        |
|       102 | Carol       |
|       103 | Sam         |
+-----------+-------------+
3 rows in set (0.00 sec)

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