如何使用带 WHERE 子句的 MySQL VIEW?
mysqlmysqli database更新于 2024/3/7 5:47:00
对于带 WHERE 子句的 MySQL VIEW，语法如下 −
select * from yourViewName where yourColumnName='yourValue';
让我们首先创建一个 −
mysql> create table DemoTable1432 -> ( -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> StudentName varchar(20), -> StudentBranchName varchar(20) -> ); Query OK, 0 rows affected (1.26 sec)
使用 insert 在表中插入一些记录 −
mysql> insert into DemoTable1432(StudentName,StudentBranchName) values('Chris','CS');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable1432(StudentName,StudentBranchName) values('David','CE');
Query OK, 1 row affected (0.23 sec)
mysql> insert into DemoTable1432(StudentName,StudentBranchName) values('Mike','ME');
Query OK, 1 row affected (0.20 sec)
使用 select 语句显示表中的所有记录 −
mysql> select * from DemoTable1432;
这将产生以下输出 −
+-----------+-------------+-------------------+ | StudentId | StudentName | StudentBranchName | +-----------+-------------+-------------------+ | 1 | Chris | CS | | 2 | David | CE | | 3 | Mike | ME | +-----------+-------------+-------------------+ 3 rows in set (0.00 sec)
以下是创建视图 − 的查询
mysql> create view DemoTable1432_View as select * from DemoTable1432; Query OK, 0 rows affected (0.17 sec)
以下是使用 MySQL 视图与 where 子句的查询 −
mysql> select * from DemoTable1432_View where StudentBranchName='CS';
这将产生以下输出 −
+-----------+-------------+-------------------+ | StudentId | StudentName | StudentBranchName | +-----------+-------------+-------------------+ | 1 | Chris | CS | +-----------+-------------+-------------------+ 1 row in set (0.03 sec)
