MySQL timediff

timediff

あとの時間を第一引数、さきの時間を第二引数

mysql> SELECT TIMEDIFF('2008-12-31 01:01:01.000000', '2008-12-31 01:01:00.000000');
+----------------------------------------------------------------------+
| TIMEDIFF('2008-12-31 01:01:01.000000', '2008-12-31 01:01:00.000000') |
+----------------------------------------------------------------------+
| 0:00:01                                                              |
+----------------------------------------------------------------------+
1 row in set
mysql> SELECT TIMEDIFF('2008-12-31 01:01:02.000000', '2008-12-31 01:00:00.000000') > '00:00:01';
+-----------------------------------------------------------------------------------+
| TIMEDIFF('2008-12-31 01:01:02.000000', '2008-12-31 01:00:00.000000') > '00:00:01' |
+-----------------------------------------------------------------------------------+
| 1                                                                                 |
+-----------------------------------------------------------------------------------+
1 row in set
mysql> SELECT TIMEDIFF('2008-12-31 01:01:02.000000', '2008-12-31 01:00:00.000000') < '00:00:01';
+-----------------------------------------------------------------------------------+
| TIMEDIFF('2008-12-31 01:01:02.000000', '2008-12-31 01:00:00.000000') < '00:00:01' |
+-----------------------------------------------------------------------------------+
| 0                                                                                 |
+-----------------------------------------------------------------------------------+
1 row in set

MySQL :: MySQL 5.6 リファレンスマニュアル :: 12.7 日付および時間関数