Hi,
Try this query for easy comparison:
SELECT
[CustName] as CustName,[2011],[2012],[2013]
from
(SELECT
T0.[CardName] as CustName, sum(T1.[LineTotal]) as Total,
datepart(yy,T0.[DocDate]) as year FROM OINV T0 INNER JOIN INV1 T1 ON
T0.DocEntry = T1.DocEntry WHERE
T0.[CardCode] = 'cvet01' GROUP BY T0.[CardName],T0.[DocDate]
union all
(SELECT
T0.[CardName] as CustName, -sum(T1.[LineTotal]) as Total,
datepart(yy,T0.[DocDate]) as year FROM ORIN T0 INNER JOIN RIN1 T1 ON
T0.DocEntry = T1.DocEntry WHERE
T0.[CardCode] = 'cvet01' GROUP BY T0.[CardName],T0.[DocDate])) S
Pivot (sum(S.total) For YEAR IN ([2011],[2012],[2013])) P
Thank you