让我们首先创建一个表-
mysql> create table DemoTable821(AdmissionDate datetime);
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable821 values('2019-01-21'); mysql> insert into DemoTable821 values('2018-11-02'); mysql> insert into DemoTable821 values('2016-12-31'); mysql> insert into DemoTable821 values('2015-03-19');
使用select语句显示表中的所有记录-
mysql> select *from DemoTable821;
这将产生以下输出-
+---------------------+ | AdmissionDate | +---------------------+ | 2019-01-21 00:00:00 | | 2018-11-02 00:00:00 | | 2016-12-31 00:00:00 | | 2015-03-19 00:00:00 | +---------------------+ 4 rows in set (0.00 sec)
这是在DateTime字段中设置当前日期的查询-
mysql> update DemoTable821 set AdmissionDate=CURDATE(); Rows matched: 4 Changed: 4 Warnings: 0
让我们再次检查表记录-
mysql> select *from DemoTable821;
这将产生以下输出-
+---------------------+ | AdmissionDate | +---------------------+ | 2019-08-03 00:00:00 | | 2019-08-03 00:00:00 | | 2019-08-03 00:00:00 | | 2019-08-03 00:00:00 | +---------------------+ 4 rows in set (0.00 sec)