sql - 如何计算MySQL中日期时间之间的间隔？

Question

例如，如何计算这两个日期时间之间的间隔:

2009-09-18 00:00:00

2009-10-17 00:00:00

编辑

我的意思是获取格式为年-月-日时:分:秒的区间

Answer 1

使用 datediff 怎么样？ :

mysql> select abs(datediff('2009-09-18 00:00:00', '2009-10-17 00:00:00'));
+-------------------------------------------------------------+
| abs(datediff('2009-09-18 00:00:00', '2009-10-17 00:00:00')) |
+-------------------------------------------------------------+
|                                                          29 |
+-------------------------------------------------------------+
1 row in set (0.00 sec)

引用手册:

DATEDIFF() returns expr1 – expr2 expressed as a value in days from one date to the other. expr1 and expr2 are date or date-and-time expressions.
Only the date parts of the values are used in the calculation.