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

Check Query

 update yourtable set eventtime=replace(eventtime,substr(eventtime,1,10), '2013-07-17')  WHERE  `id`=4