Code Snippet
Select AGREEMENT_ID,
(SELECT Sum(Instalment_Amount) FROM dbo.D_Parce_Parcelas_Oi AS TInt
WHERE TOut.AGREEMENT_ID = TInt.AGREEMENT_ID AND Payed_Date is not null
and Arbor_Invoice_Id is not null) AS Valor_Pago,
(SELECT Sum(Instalment_Amount) FROM dbo.D_Parce_Parcelas_Oi AS TInt
WHERE TOut.AGREEMENT_ID = TInt.AGREEMENT_ID AND Payed_Date is null
and Arbor_Invoice_Id is null) AS Valor_Aberto
From dbo.D_Parce_Parcelas_Oi AS TOut
Where AGREEMENT_ID = 3211389