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)
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