mysql where exact match

Question

When i write this query

SELECT cd.title, cd.city FROM coupon_detail cd WHERE cd.id = 260;

return

title            city  
--         


        

Answer 1

This is happening because of Type Conversion in MySql. My sql treats '260abcxyz' as an integer in your query and AFAIK because first char is number MySql casts it to a number and it becomes only 260 and that's why you are getting result. If you write character first like 'abcxyz260' it will successes the comparison.

More explanation available here: Type Conversion in MySql

As a solution: you should take care that only numbers are passed in comparison and not combination of string and number.