Hi Mohamed,
Try this
Select S1.SrcvCallID AS [Service call No.],s1.DocPstDate [Created Date],s2.CardName
[Customer Name],s1.DocNumber [Sales Invoice No against service call],s2.DocTotal
[Total Expense against service call]
From SCL4 S1 LEFT JOIN OINV S2 ON S1.DocAbs=S2.DocEntry
Where S1.Object=13
Regards,
Manish