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SQL Server Stored Proc Help Needed
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Gary View Drop Down
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Points: 326 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary Quote  Post ReplyReply Direct Link To This Post Topic: SQL Server Stored Proc Help Needed
    Posted: 20 January 2004 at 4:57am

Hi,

Working with asp and SQL Server, I want to have a dynamic stored proucedure that can accept 2 values, but will also work with 1 value...

CREATE PROCEDURE [mySP]
    @value1 nvarchar(7),
    @value2 nvarchar(7)
AS
    SELECT *
    FROM myTable
    WHERE [col1] = @value1 AND [col2] = value2

Easy enough if both values are provided (eg mySP 'x', 'y'). However, I may not be passing the second value (eg mySP 'x'), but then the sp throughs an error as it expects 2 values.

How can this be achieved ???
Thx
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gavinc View Drop Down
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Points: 14 		Post Options Post Options   Thanks (0) Thanks(0)   Quote gavinc Quote  Post ReplyReply Direct Link To This Post Posted: 20 January 2004 at 9:21am
Originally posted by Gary Gary wrote:

CREATE PROCEDURE [mySP]
    @value1 nvarchar(7),
    @value2 nvarchar(7)
AS
    SELECT *
    FROM myTable
    WHERE [col1] = @value1 AND [col2] = value2

What you can do is to assign a default value to the optional parameter:

CREATE Procedure sp_MyProc @Val1 varchar(5), @Val2 varchar(5) = NULL AS etc....

but you will probably have to change the code of the procedure so that it runs one of two select queries depenind on the value of the option parameters since i'm not 100% sure if you can say:

WHERE Col1 = @Val1 AND Col2 = @Val2 if @Val2 is NULL

I think you will have to say:

WHERE Col1 = @Val1 AND Col2 IS NULL

 
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Mart View Drop Down
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Points: 2304 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mart Quote  Post ReplyReply Direct Link To This Post Posted: 20 January 2004 at 12:53pm
Try


CREATE PROCEDURE [mySP]

    @value1 nvarchar(7),

    @value2 nvarchar(7) = NULL

AS

    SELECT *

    FROM myTable

    WHERE [col1] = @value1 AND [col2] = value2

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Flamewave View Drop Down
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Points: 376 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Flamewave Quote  Post ReplyReply Direct Link To This Post Posted: 21 January 2004 at 12:18am 


CREATE PROCEDURE dbo.mySP
    @value1 nvarchar(7),
    @value2 nvarchar(7)
AS
If @value2 is null or @value2=''
    Select * From myTable Where col1 = @value1
Else
    Select * From myTable Where col1 = @value1 and col2 = @value2

Then if you dont want to use the second value, pass it as NULL
exec dbo.mysp 'value1', null



Edited by Flamewave
- Flamewave

They say the grass is greener on the other side, but if you really think about it, the grass is greener on both sides.
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psycotik View Drop Down
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Points: 73 		Post Options Post Options   Thanks (0) Thanks(0)   Quote psycotik Quote  Post ReplyReply Direct Link To This Post Posted: 21 January 2004 at 1:55am

CREATE PROCEDURE [mySP]
    @value1 nvarchar(7),
    @value2 nvarchar(7) = Null
AS
    SELECT *
    FROM myTable
    WHERE [col1] = @value1 AND ([col2] = value2 OR @value2 is Null)
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