MySql difference between two timestamps in days?

Question

How can I get the difference between two timestamps in days? Should I be using a datetime column for this?

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I switched my column to datetime. Simple subtraction doesn\'t

Answer 1

If you're happy to ignore the time portion in the columns, DATEDIFF() will give you the difference you're looking for in days.

SELECT DATEDIFF('2010-10-08 18:23:13', '2010-09-21 21:40:36') AS days;
+------+
| days |
+------+
|   17 |
+------+