How to get the number of days of difference between two dates on MySQL?

What about the DATEDIFF function ?

Quoting the manual’s page :

DATEDIFF() returns expr1 – expr2
expressed as a value in days from one
date to the other. expr1 and expr2
are date or date-and-time expressions.
Only the date parts of the values are
used in the calculation

In your case, you’d use :

mysql> select datediff('2010-04-15', '2010-04-12');
+--------------------------------------+
| datediff('2010-04-15', '2010-04-12') |
+--------------------------------------+
|                                    3 | 
+--------------------------------------+
1 row in set (0,00 sec)

But note the dates should be written as YYYY-MM-DD, and not DD-MM-YYYY like you posted.

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