Need to define selection criteria

Question

How can i define  OITL.DocDate<=  as a selection criteria instead of a static value in this query
SELECT
      OLCT.Location,OWHS.WhsName
      ,OBTN.DistNumber,SUM(OBTN.Balance)Balance
      ,OPCH.DocDate,OPCH.DocNum,OPCH.NumAtCard,OPCH.CardCode+' - '+OPCH.CardName,PCH1.Dscription
FROM
      OPCH
      INNER JOIN PCH1 ON OPCH.DocEntry=PCH1.DocEntry
      INNER JOIN PDN1 ON PCH1.BaseType=PDN1.ObjType AND PCH1.BaseEntry=PDN1.DocEntry AND PCH1.BaseLine=PDN1.LineNum
      INNER JOIN OITL ON PDN1.ObjType=OITL.DocType AND PDN1.DocEntry=OITL.DocEntry AND PDN1.LineNum=OITL.DocLine
      INNER JOIN ITL1 ON OITL.LogEntry=ITL1.LogEntry AND OITL.ItemCode=ITL1.ItemCode
      INNER JOIN (
                        SELECT
                              OBTN.AbsEntry,OBTN.DistNumber,SUM(ITL1.Quantity)[Balance],OBTN.U_RefID
                        FROM
                              OBTN
                              INNER JOIN ITL1 ON OBTN.AbsEntry=ITL1.MdAbsEntry
                              INNER JOIN OITL ON ITL1.LogEntry=OITL.LogEntry AND ITL1.ItemCode=OITL.ItemCode
                       where OITL.DocDate<= '20140331'
                        GROUP BY
                              OBTN.AbsEntry,OBTN.DistNumber,OBTN.U_RefID
                        )OBTN ON ITL1.MdAbsEntry=OBTN.AbsEntry
      INNER JOIN OWHS ON PCH1.WhsCode=OWHS.WhsCode
      INNER JOIN OLCT ON PCH1.LocCode=OLCT.Code
      WHERE OBTN.Balance>0
      GROUP BY OLCT.Location,OWHS.WhsName,OBTN.DistNumber,OPCH.DocDate,OPCH.DocNum,OPCH.NumAtCard,OPCH.CardCode,OPCH.CardName,PDN1.DocEntry,PCH1.Dscription
      ORDER BY PDN1.DocEntry

Answer 1

Hi,
Try this query:
declare @date as datetime
set @date = ( select max(T0.[DocDate]) from OITL T0 where T0.[DocDate] <= [%0])
SELECT
      OLCT.Location,OWHS.WhsName
      ,OBTN.DistNumber,SUM(OBTN.Balance)Balance
      ,OPCH.DocDate,OPCH.DocNum,OPCH.NumAtCard,OPCH.CardCode+' - '+OPCH.CardName,PCH1.Dscription
FROM
      OPCH
      INNER JOIN PCH1 ON OPCH.DocEntry=PCH1.DocEntry
      INNER JOIN PDN1 ON PCH1.BaseType=PDN1.ObjType AND PCH1.BaseEntry=PDN1.DocEntry AND PCH1.BaseLine=PDN1.LineNum
      INNER JOIN OITL ON PDN1.ObjType=OITL.DocType AND PDN1.DocEntry=OITL.DocEntry AND PDN1.LineNum=OITL.DocLine
      INNER JOIN ITL1 ON OITL.LogEntry=ITL1.LogEntry AND OITL.ItemCode=ITL1.ItemCode
      INNER JOIN (
                        SELECT
                              OBTN.AbsEntry,OBTN.DistNumber,SUM(ITL1.Quantity)[Balance]
                        FROM
                              OBTN
                              INNER JOIN ITL1 ON OBTN.AbsEntry=ITL1.MdAbsEntry
                              INNER JOIN OITL ON ITL1.LogEntry=OITL.LogEntry AND ITL1.ItemCode=OITL.ItemCode
                        where OITL.DocDate<= @date
                        GROUP BY
                              OBTN.AbsEntry,OBTN.DistNumber
                        )OBTN ON ITL1.MdAbsEntry=OBTN.AbsEntry
      INNER JOIN OWHS ON PCH1.WhsCode=OWHS.WhsCode
      INNER JOIN OLCT ON PCH1.LocCode=OLCT.Code
      WHERE OBTN.Balance>0
      GROUP BY OLCT.Location,OWHS.WhsName,OBTN.DistNumber,OPCH.DocDate,OPCH.DocNum,OPCH.NumAtCard,OPCH.CardCode,OPCH.CardName,PDN1.DocEntry,PCH1.Dscription
      ORDER BY PDN1.DocEntry
Thanks & Regards,
Nagarajan