如何找到MySQL中两个日期之间的区别？

Question

如何在MySQL中找到两个日期之间的差异？

Answer 1

DATEDIFF返回两个日期之间的天数差异：

http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_datediff

Answer 2

mysql> select current_date()>'2011-01-01 12:01:01';
+--------------------------------------+
| current_date()>'2011-01-01 12:01:01' |
+--------------------------------------+
|                                    1 |
+--------------------------------------+
1 row in set (0.00 sec)

mysql> select '2011-01-01 12:01:01' > current_date();
+----------------------------------------+
| '2011-01-01 12:01:01' > current_date() |
+----------------------------------------+
|                                      0 |
+----------------------------------------+
1 row in set (0.00 sec)

mysql> 

Answer 3

了解DATEDIFF

eg :     SELECT DATEDIFF('2007-12-31 23:59:59','2007-12-30');