MySQL SECOND() Function

Return the seconds part of a datetime value:

SELECT SECOND("2017-06-20 09:34:00.000023");

Definition and Usage

The SECOND() function returns the seconds part of a time/datetime (from 0 to 59).

SECOND(datetime)

Parameter	Description
datetime	Required. The time or datetime to extract the second from

Works in:	From MySQL 4.0

Return the seconds part of a time value:

SELECT SECOND("23:59:59");