Hi Mohamed,
Try below Query
SELECT T0.internalSN as [S.No],T0.[custmrName] [Customer Name ], T0.[callID] [Service Call Number], T0.[createDate] [Creation Date],T2.U_WorkLocation,T2.[DocTotal] [Total Expense against of Service Call]
FROM OSCL T0 INNER JOIN SCL4 T1 ON T0.callID = T1.SrcvCallID left join ORDR T2 on T2.docentry = T1.[DocAbs]
Regards,
Manish