How to display rows that when added together equal zero

Question

Been searching for a few weeks for a solution to this but have come up blank.

I have table of data similar to this:

client_ref  supplier_key  client_amou         


        

Answer 1

Try this instead:

SELECT t1.*
FROM transactions AS t1
INNER JOIN
(
  SELECT
    tbis.client_ref ,
    tbis.supplier_key,
    sum(tbis.client_amount) AS total
  FROM transactions tbis 
  WHERE tbis.client_amount !=0 
  GROUP BY tbis.client_ref, tbis.supplier_key 
  HAVING sum(tbis.client_amount) =0 
) AS t2  ON t1.client_ref = t2.client_ref
        AND t1.supplier_key = t2.supplier_key
ORDER BY t2.total;

• SQL Fiddle Demo