How to find duplicates in 2 columns not 1

Question

I have a MySQL database table with two columns that interest me. Individually they can each have duplicates, but they should never have a duplicate of BOTH of them having th

Answer 1

You can find duplicates like this..

Select
    stone_id, upcharge_title, count(*)
from 
    particulartable
group by 
    stone_id, upcharge_title
having 
    count(*) > 1