如何批量更新 MySQL 表?
mysqlmysqli database
首先我们创建一个表 −
mysql> create table DemoTable -> ( -> BreakfastTime time -> ); Query OK, 0 rows affected (0.59 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable values('7:30:45');
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable values('8:00:30');
Query OK, 1 row affected (0.20 sec)
mysql> insert into DemoTable values('7:55:00');
Query OK, 1 row affected (0.10 sec)
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'); Query OK, 3 rows affected (0.13 sec) Rows matched: 3 Changed: 3 Warnings: 0
让我们再次检查表记录 −
mysql> select * from DemoTable;
这将产生以下输出 −
+---------------+ | BreakfastTime | +---------------+ | 09:30:45 | | 10:00:30 | | 09:55:00 | +---------------+ 3 rows in set (0.00 sec)
