如何批量更新MySQL表？
让我们首先创建一个表-
mysql> create table DemoTable -> ( -> BreakfastTime time -> );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable values('7:30:45');
mysql> insert into DemoTable values('8:00:30');
mysql> insert into DemoTable values('7:55:00');使用select语句显示表中的所有记录-
mysql> select * from DemoTable;
这将产生以下输出-
+---------------+ | BreakfastTime | +---------------+ | 07:30:45 | | 08:00:30 | | 07:55:00 | +---------------+ 3 rows in set (0.00 sec)
以下是批量更新MySQL表的查询-
mysql> update DemoTable -> set BreakfastTime=addtime(BreakfastTime,'2:00:00'); Rows matched: 3 Changed: 3 Warnings: 0
让我们再次检查表记录-
mysql> select * from DemoTable;
+---------------+ | BreakfastTime | +---------------+ | 09:30:45 | | 10:00:30 | | 09:55:00 | +---------------+ 3 rows in set (0.00 sec)