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Parameterised Input stored procedure

Discussion in 'SQL Server' started by fdtoo, Nov 7, 2007.

  1. fdtoo

    fdtoo New Member

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    I need to create a stored procedure with a parameterised input. An input parameter is declared as a variable, this will hold the units that a user wants to insert from TableA into TableB. Using a CASE clause, within a stored procedure, it will first need to compare the input parameter against the avaiable units in TableA, let's say in this case, an input of 3 units of Item_No (1235), is required to be inserted into TableB's 4 columns (refer below for field names). The stored procedure should be able to assign the units required base on the earliest Item_ID (1st Primary key comes first, on a first-in-first-out basis) from TableA, by first filtering a number of sequential criteria. First it would search for the Item_No (1235) in TableA, next its available units, if both condition are met, next, insert a row of record into TableB's 4 columns, If units required is insufficient, it would loop for the next available units, then inserting the next row of records into TableB. An update procedure
    is also required to be created to update the units being used for the assignment in TableA (refer table below for updated records for Item_No (1235).

    The following are the fieldnames in TableA running on SQL Server 2000:

    Dates as datetime
    Item_ID as int (Primary key)
    Item_No as int
    Qty as int
    Unit_Price as int

    TableA consist of the following info :
    ======================================
    Dates | Item_ID | Item_No | Qty | Unit_Price
    ======================================
    30/10/2007 | IT1000 | 1234 | 2 | 4
    ======================================
    30/10/2007 | IT1001 | 1235 | 2 | 6
    ======================================
    28/09/2007 | IT1002 | 1236 | 4 | 8
    ======================================
    01/11/2007 | IT1003 | 1235 | 2 | 2

    INSERT Result in TableB after executing the stored procedure :
    ======================================
    Dates | Item_ID | Item_No | Qty | Unit_Price
    ======================================
    30/10/2007 | IT1001 | 1235 | 2 | 6
    ======================================
    01/11/2007 | IT1003 | 1235 | 1 | 2

    UPDATE Result in TableA after executing the stored procedure :
    ======================================
    Dates | Item_ID | Item_No | Qty | Unit_Price
    ======================================
    30/10/2007 | IT1000 | 1234 | 2 | 4
    ======================================
    30/10/2007 | IT1001 | 1235 | 0 | 6
    ======================================
    28/09/2007 | IT1002 | 1236 | 4 | 8
    ======================================
    01/11/2007 | IT1003 | 1235 | 1 | 2

    The following stored procedure was created:

    Create procedure dbo.up_parmins_item
    @Date_DT VARCHAR(22),
    @Item_No INT,
    @Qty_IT INT,
    @Unit_Price_IT INT as

    Declare @Item_ID INT

    Select @Item_ID = Item_ID
    From TableA
    Where Item_No = @Item_No and Qty <> 0
    -- If item not exist, then insert into TableA
    If @Item_ID IS NULL
    BEGIN
    Insert into TableA
    ( Dates,Item_No,Qty,Unit_Price)
    Values(Getdate(),@Item_No,@Qty_IT,@Unit_Price_IT)
    Set @Item_ID = @@IDENTITY
    END
    -- If item exist, and Qty is not 0, then insert into TableB and Update TableA
    If @Item_ID IS NOT NULL and Qty <> 0
    BEGIN
    Set @Item_ID = Min(Item_ID),
    Insert into TableB
    ( Dates ,Item_ID,Qty,Unit_Price)
    Values(Getdate(),@Item_ID,@Qty_IT,@Unit_Price_IT)
    -- update quantity balance for Item_No (1235) in TableA
    Update TableA
    Set Qty = (@Qty_IT - Qty)
    Where Item_No = @Item_No
    END

    If @@Error > 0
    BEGIN
    RAISERROR ('Update and Insert Items failed',16,1)
    RETURN 99
    END

    RETURN 0

    My issue here is, how do I create a CASE clause or if-else statement to verify the quantity (Qty) available in TableA is sufficient for the input parameter (@Qty_IT) to be inserted into TableB? The procedure should be able to perform a loop in the CASE or If-else statement to allocate the quantity requested base on the earliest Item_ID existing in TableA, and the next available units in the subsequent Item_ID (e.g. (1st) IT1001 - 2 units,(2nd) IT1003 - balance of 1 unit) If the units requested (input parameter) for an item, does not exist in TableA, a new record is then inserted into TableA for this new item. The update statement should be able to update the quantity for Item_No (1235) to 0 unit under Item_ID IT1001, and 1 unit under Item_ID IT1003.

    Any suggestion to the above stored procedure would be helpful, Thanks guys!
     
  2. narayan

    narayan New Member

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    Just tell us whats your problem instead of typing a lengthy post
     

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