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POnull in return value in sql procedure
 

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    <p>I'm trying to build a procedure that returns a nvarchar value. It seems to work fine up until I try to get the value from the procedure. This is all the code from my procedure:</p> <pre><code>ALTER PROCEDURE [dbo].[_MG_NextInventoryPackNumberForPartNumber] @sPartNumber NVARCHAR(254) --##PARAM @sPartNumber The part number for which we need to get the new InventoryPackNo AS BEGIN SET NOCOUNT ON; DECLARE @num INT, @sNewInventoryPackNum NVARCHAR(254), @StringNum NVARCHAR(254) SET @StringNum = (SELECT SUBSTRING(InventoryPackNo, 9, 5) AS pName FROM InventoryPack WHERE SUBSTRING(InventoryPackNo, 1, 8) LIKE @sPartNumber) SET @num = CONVERT(INT, @StringNum) SET @num = @num + 1 IF @num &gt;= 1 AND @num &lt;= 9 BEGIN SET @StringNum = CONVERT(NVARCHAR(254), @num) SET @StringNum = '0000' + @StringNum END IF @num &gt;= 10 AND @num &lt;= 99 BEGIN SET @StringNum = CONVERT(NVARCHAR(254), @num) SET @StringNum = '000' + @StringNum END IF @num &gt;= 100 AND @num &lt;= 999 BEGIN SET @StringNum = CONVERT(NVARCHAR(254), @num) SET @StringNum = '00' + @StringNum END IF @num &gt;= 1000 AND @num &lt;= 9999 BEGIN SET @StringNum = CONVERT(NVARCHAR(254), @num) SET @StringNum = '0' + @StringNum END IF @num &gt;= 10000 AND @num &lt;= 99999 BEGIN SET @StringNum = CONVERT(NVARCHAR(254), @num) END IF @num = 100000 BEGIN SET @StringNum = '00000' END SET @sNewInventoryPackNum = @sPartNumber + @StringNum + '10' PRINT @sNewInventoryPackNum RETURN @sNewInventoryPackNum END </code></pre> <p>This is how I try to call the procedure:</p> <pre><code>DECLARE @sNuwNum NVARCHAR(254) EXEC @sNuwNum = _MG_NextInventoryPackNumberForPartNumber '77510002' PRINT @sNuwNum </code></pre> <p>The procedure should return this value: 775100020000210. But all I get in the console part of the screen is this:</p> <pre><code>775100020000210 Msg 248, Level 16, State 1, Procedure _MG_NextInventoryPackNumberForPartNumber, Line 51 The conversion of the nvarchar value '775100020000210' overflowed an int column. The '_MG_NextInventoryPackNumberForPartNumber' procedure attempted to return a status of NULL, which is not allowed. A status of 0 will be returned instead. 0 </code></pre> <p>I'm using SQL server 2008. I'm quite sure that I have to change something small, but could you please tell me what?</p>
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    1. COAlmost duplicate: [here](http://stackoverflow.com/questions/9837481/return-value-in-sql-server-stored-procedure). SQL Server returns always int as return value. For this purpose, use a function (UDF).
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    2. CODuplicate answer, perhaps. The OP for that question didn't have an explicit `RETURN`.
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      1. USPaul Draper
 

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