second
description
Syntax
INT SECOND(DATETIME date)
Returns second information in the time type, ranging from 0,59
The parameter is Date or Datetime type
example
mysql> select second('2018-12-31 23:59:59');
+-----------------------------+
| second('2018-12-31 23:59:59') |
+-----------------------------+
| 59 |
+-----------------------------+