Hi Avijit,
Try This :
SELECT T0.ITEMCODE ,
T0.ONHAND as 'Total Qty',
(T0.ONHAND*T0.AVGPRICE) 'Stock Value',
T1.LASTPURDAT,
FROM OITW T0 INNER JOIN OITM T1 ON T0.ITEMCODE = T1.ITEMCODE
INNER JOIN OITB T2 ON T1.ITMSGRPCOD=T2.ITMSGRPCOD
WHERE T0.ONHAND>0 AND T0.WhsCode ='[%0]'
Regards,
Vamsi