MySQL DATETIME - Change only the date

Question

Starting with : 2011-01-17 09:30:00

Let\'s say I want to edit just the date with 2011-01-28

What is the most efficient way to end up with: 2011-01-28 09:30:0

Answer 1

Going to use something like:

CONCAT('2011-01-28 ',DATE_FORMAT(original_timestamp, '%H:%i:%s'))