让我们首先创建一个表-
mysql> create table DemoTable ( Logouttime time );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable values('5:50:00'); mysql> insert into DemoTable values('6:10:10'); mysql> insert into DemoTable values('8:00:50');
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-
+------------+ | Logouttime | +------------+ | 05:50:00 | | 06:10:10 | | 08:00:50 | +------------+ 3 rows in set (0.00 sec)
以下是在MySQL中基于秒计算时间的查询-
mysql> select sec_to_time(sum(time_to_sec(Logouttime))) from DemoTable;
这将产生以下输出-
+-------------------------------------------+ | sec_to_time(sum(time_to_sec(Logouttime))) | +-------------------------------------------+ | 20:01:00 | +-------------------------------------------+ 1 row in set (0.80 sec)