在MySQL中将秒数舍入到最接近的半分钟?
要将秒取整到最接近的半分钟,请使用CEILING()
。让我们首先创建一个表-
mysql> create table DemoTable (secondValue int);
示例
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable values(27); mysql> insert into DemoTable values(56); mysql> insert into DemoTable values(118);
使用select语句显示表中的所有记录-
mysql> select *from DemoTable;
输出结果
+-------------+ | secondValue | +-------------+ | 27 | | 56 | | 118 | +-------------+ 3 rows in set (0.00 sec)
以下是四舍五入的查询-
mysql> select secondValue, CEILING(secondValue / 30) / 2 AS ApproxMinutes from DemoTable;
输出结果
+-------------+---------------+ | secondValue | ApproxMinutes | +-------------+---------------+ | 27 | 0.5000 | | 56 | 1.0000 | | 118 | 2.0000 | +-------------+---------------+ 3 rows in set (0.00 sec)