Select rows with same id but different value in another column

Question

I tried for hours and read many posts but I still can\'t figure out how to handle this request:

I have a table like this:

+------+------+
|ARIDNR|LIE         


        

Answer 1

You can simply achieve it by

SELECT *
FROM test
WHERE ARIDNR IN
    (SELECT ARIDNR FROM test
     GROUP BY ARIDNR
     HAVING COUNT(*) > 1)
GROUP BY ARIDNR, LIEFNR;

Thanks.