Question

I have upgraded my Mysql version from Mysql5.0 to Mysql5.5,

This is query returning null but same query was returning value before upgrade.

SELECT  DATE_FORMAT(DATE_ADD(STR_TO_DATE('2010-04', '%Y-%m'), INTERVAL 2 YEAR),'%Y-%m')

Should return 2012-04

My date values are of varchar type I want to add interval of 2 years.

Is there any other way to achieve this OR Please tell me how to correct it?

Answer 1

Mysql version > 5.0 str_to_date() sometimes would return NULL if the %D format specifier is not the last specifier in the format string input.

You need to apply some trick (specify %D here ).

Try below:

 SELECT DATE_FORMAT(DATE_ADD(STR_TO_DATE('2010-04-01', '%Y-%m-%d'), INTERVAL 1 YEAR),'%Y-%m')