MYSQL Date Time Round To Nearest Hour

Question

I have a date time field in a MySQL database and wish to output the result to the nearest hour.

e.g. 2012-04-01 00:00:01 should read 2012-04-01 00

Answer 1

If you need to round just time to next hour you may use this:

SELECT TIME_FORMAT(
  ADDTIME(
    TIMEDIFF('16:15', '10:00'), '00:59:00'
  ),
  '%H:00:00'
)