mysql> SELECT SEC_TO_TIME (3600);
+--------------------+
| SEC_TO_TIME (3600) |+--------------------+
| 01:00:00 |+--------------------+
1 row in set (0.00 sec)
mysql> SELECT TIME_TO_SEC('00:01:00') A;
+----+
| A |+----+
| 60 |+----+
1 row in set (0.00 sec)
如：
SELECT SEC_TO_TIME(sum(time_len_s)) FROM `cti_agent_login`;