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ASP.NET CODE

Call Stored procedure from within another stored procedure, return values
By: aspfree
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    2003-05-07

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    This quick how-to shows an example of having two stored procedures that one stored procedure executes the other stored procedure passing values and returning a value to the calling parent stored proc. This would be handy passing in a value to dynamically populate a lookup table and stored that Id as a foreign key in a datatable. . This example asssumes you would have a parent table and a child/lookup table related back to the parent table.


    'This stored procedure is called by a bu ...This quick how-to shows an example of having two stored procedures that one stored procedure executes the other stored procedure passing values and returning a value to the calling parent stored proc.  This would be handy passing in a value to dynamically populate a lookup table and stored that Id as a foreign key in a datatable.  .  This example asssumes you would have a parent table and a child/lookup table related back to the parent table.
    [code]
    '
    This stored procedure is called by a business component or webpage 
    'passing into two parameters, executes sp_ChildStoredProc and passes on value. 
    '
    The @Id OUTPUT returns the value.  

    CREATE PROCEDURE sp_ParentStoredProc
    (
    @
    col1 varchar(20)
    @
    ValuePassed varchar(50),
    )
    AS

    declare @
    Id int
    EXEC sp_ReturnValue 
    @ValuePassed, @Id OUTPUT

    INSERT INTO SomeTable
    (col1col2)
    VALUES
    (@col1, @Id)
    RETURN
    GO 

    'This stored procedure is executed in the sp_ParentStoredProc above and passes'a varchar variable piece of data. The spChildStoredProc will insert this piece of data'into a lookup table if it doesn't exist, return the Identity column using Scope_Identity() function or'will return the identity value to the parent stored proc if the piece of data passed in already exists in the lookup table.


    CREATE PROCEDURE sp_ChildStoredProc

    (
    @
    ValuePassedIn varchar(50),
    @
    Id smallint OUTPUT
    )
     AS

    If 
    exists (SELECT column1 FROM LookUpTable WHERE column1=@ValuePassedIn)
    BEGIN
    SET 
    @Id = (SELECT column1 
       FROM LookUpTable 
       WHERE column1
    =@ValuePassedIn)
    END 
    ELSE
    BEGIN
    INSERT INTO LookUpTable
    (column1
    VALUES(@ValuePassedIn)
        
        
    SET @Id Scope_Identity()
    END
    GO


    DISCLAIMER: The content provided in this article is not warranted or guaranteed by Developer Shed, Inc. The content provided is intended for entertainment and/or educational purposes in order to introduce to the reader key ideas, concepts, and/or product reviews. As such it is incumbent upon the reader to employ real-world tactics for security and implementation of best practices. We are not liable for any negative consequences that may result from implementing any information covered in our articles or tutorials. If this is a hardware review, it is not recommended to open and/or modify your hardware.

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