使用 AND 运算符执行 MySQL 更新
mysqlmysqli database
首先我们创建一个表 −
mysql> create table DemoTable613 (Id int,Age int,isMarried tinyint(1)); Query OK, 0 rows affected (0.54 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable613 values(100,29,0); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable613 values(200,22,0); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable613 values(300,30,1); Query OK, 1 row affected (0.19 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable613;
这将产生以下输出 −
+------+------+-----------+ | Id | Age | isMarried | +------+------+-----------+ | 100 | 29 | 0 | | 200 | 22 | 0 | | 300 | 30 | 1 | +------+------+-----------+ 3 rows in set (0.00 sec)
以下是使用 AND 运算符执行 MySQL 更新的查询 −
mysql> update DemoTable613 set isMarried=(Age=29 AND (Id=100)); Query OK, 2 rows affected (0.24 sec) Rows matched: 3 Changed: 2 Warnings: 0
让我们再次检查表记录 −
mysql> select *from DemoTable613;
这将产生以下输出 −
+------+------+-----------+ | Id | Age | isMarried | +------+------+-----------+ | 100 | 29 | 1 | | 200 | 22 | 0 | | 300 | 30 | 0 | +------+------+-----------+ 3 rows in set (0.00 sec)
