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

One possible approach is to use the SUM() windowing function:

SELECT * 
FROM
( SELECT tbis.client_ref ,tbis.supplier_key,tbis.client_amount,
  SUM(tbis.client_amount) OVER (
    PARTITION BY tbis.client_ref, tbis.supplier_key) AS total_client_amount
  FROM [XXXX].[dbo].[transaction] tbis 
  WHERE tbis.client_amount !=0 
)
WHERE total_client_amount = 0

SQL Fiddle