MySQL中l获取两个时间的小时、分钟、秒之差

MySQL中l获取两个时间的小时之差：

select timestampdiff(hour, "2018-12-25 19:15:16","2018-12-25 23:55:16") as hour_diff;

+-----------+
| hour_diff |
+-----------+
|         4 |
+-----------+
1 row in set (0.00 sec)

MySQL中l获取两个时间的分钟之差：

select timestampdiff(minute, "2018-12-25 19:15:16","2018-12-25 20:55:16") as minute_diff;
+-------------+
| minute_diff |
+-------------+
|         100 |
+-------------+
1 row in set (0.00 sec)

MySQL中l获取两个时间的秒之差：

select timestampdiff(second, "2018-12-25 19:15:16","2018-12-25 19:55:16") as second_diff;
+-------------+
| second_diff |
+-------------+
|        2400 |
+-------------+
1 row in set (0.01 sec)