MYSQL Select within same table

Question

I have a table that I need a MYSQL Select statement so I can find the corrupt data and manually fix it.

Sample table

TABLE_A
id | type | value1 | value2
 1 |          


        

Answer 1

SELECT a.id as problem_id
FROM TABLE_A as a JOIN TABLE_A as b
ON a.type = b.type
WHERE a.value1 <> b.value1 OR a.value2 <> b.value2
GROUP BY problem_id;