MYSQL Round the datetime to 15 minute

Question

I want to update the datetime round to 15 minutes in a MYSQL database table.

For Example:

If the dateTime is 2013-10-08 10:36:00, I want to conv

Answer 1

You can modify answer you found (if you satisfied with it) just by concatenating date to the time:

SELECT CONCAT(DATE(time_field), 
              ' ',
              SEC_TO_TIME((TIME_TO_SEC(time_field) DIV 900) * 900))
FROM `your_table`