mysql timediff to hours

Question

I\'m Trying to get the timediff from my table and convert it to hours (it\'s for an hourly billed service)

SELECT TIME_TO_SEC(TIMEDIFF(endDate,startDa

Answer 1

eg: startDate 2010-01-31 00:00:00, endDate 2010-01-31 19:24:22

SELECT (UNIX_TIMESTAMP(dateFin)-UNIX_TIMESTAMP(dateDebut))/3600 hour_diff
FROM tasks

SELECT TIME_TO_SEC(TIMEDIFF(endDate,startDate))/3600
FROM tasks 

returns 19.4061 which is good

SELECT TIMESTAMPDIFF(HOUR, endDate, startDate) AS hours_different
FROM tasks

Only returns hours while i also need minutes to be converted.

SELECT (UNIX_TIMESTAMP(TIMEDIFF(endDate, startDate))/(60*60)) AS hours_difference
FROM tasks

returns 0. I think the first one is the most efficent. Thanks !!