MySQL TIMEDIFF() Function

Return the difference between two time expressions:

SELECT TIMEDIFF("13:10:11", "13:10:10");

Definition and Usage

The TIMEDIFF() function returns the difference between two time/datetime expressions.

Note: time1 and time2 should be in the same format, and the calculation is time1 - time2.

TIMEDIFF( time1, time2)

Parameter	Description
time1	Required. A time value
time2	Required. Another time value

Works in:	From MySQL 4.0

Return the difference between two datetime expressions:

SELECT TIMEDIFF("2017-06-25 13:10:11", "2017-06-15 13:10:10");