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)
热门推荐
10 诗词送行祝福语大全简短
11 新房开工吉日祝福语简短
12 50多岁生日简短祝福语
13 安徽疫情祝福语简短英语
14 农民朋友发财祝福语简短
15 对生活祝福语简短精辟
16 搬家词简短祝福语朋友
17 女神结婚快乐祝福语简短
18 文学短句祝福语大全简短