在特定日期更新记录，该记录与MySQL中的当前日期匹配
让我们首先创建一个表-
mysql> create table DemoTable1822
(
Amount int,
DueDate date
);使用插入命令在表中插入一些记录-
mysql> insert into DemoTable1822 values(1000,'2019-10-11'); mysql> insert into DemoTable1822 values(500,'2019-11-30'); mysql> insert into DemoTable1822 values(700,'2018-11-30');
使用select语句显示表中的所有记录-
mysql> select * from DemoTable1822;
这将产生以下输出-
+--------+------------+ | Amount | DueDate | +--------+------------+ | 1000 | 2019-10-11 | | 500 | 2019-11-30 | | 700 | 2018-11-30 | +--------+------------+ 3 rows in set (0.00 sec)
这是在特定日期更新数据库记录的查询-
mysql> update DemoTable1822 set Amount=5000 where DueDate=curdate(); Rows matched: 1 Changed: 1 Warnings: 0
让我们再次检查表记录-
mysql> select * from DemoTable1822;
这将产生以下输出-
+--------+------------+ | Amount | DueDate | +--------+------------+ | 1000 | 2019-10-11 | | 5000 | 2019-11-30 | | 700 | 2018-11-30 | +--------+------------+ 3 rows in set (0.00 sec)