How to allow NULL values in SQL query

Hi,

I am using ISNULL function to allow NULL values in Insert statement but still I am getting below error. Please suggest how to fix below error or please tell me how to allow null values in SQL query.

Error:
Cannot insert the value NULL into column 'O_ID', table 'dbo.P_Tbl'; column does not allow nulls. INSERT fails.

Query
IF object_id('tempdb..#temp') IS NOT NULL
BEGIN
	DROP TABLE #temp
END
create table #temp(ID INT IDENTITY(1, 1) ,ActID bigint)

DECLARE @v_ActID bigint;
DECLARE @v_Flag int;
DECLARE @v_UsrID bigint;
DECLARE @v_userid bigint;

SET @v_Flag=1;
SET @v_UsrID = 0;
SET @v_userid = 0;

SELECT @v_ActID=ActID  from #temp WITH(NOLOCK) where id=@v_Flag

SET @v_UsrID = 0;

SELECT @v_UsrID=O_ID FROM P_Tbl WITH(NOLOCK) WHERE O_ID=@v_ActID AND UsrID=@v_userid
SET @v_UsrID=isnull(@v_UsrID,0);

IF (@v_UsrID=0)

BEGIN		
																
INSERT INTO P_Tbl (O_ID,UsrID,C_By,M_By,C_Date,ISR)
VALUES (@v_ActID,@v_userid,-1,-1,getdate(),1)

END

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sqldba2013Asked:
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David KrollCommented:
It's complaining about O_ID, which you're inserting @v_ActID. Try adding the line:

SET @v_ActID=isnull(@v_ActID,0);
0
Randy PooleCommented:
I see you are trying to get a value from #temp without inserting anything into #temp so that column will return a null..
0
awking00Commented:
INSERT INTO P_Tbl (O_ID,UsrID,C_By,M_By,C_Date,ISR)
VALUES (COALESCE(@v_ActID,0),@v_userid,-1,-1,getdate(),1)
0
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sqldba2013Author Commented:
Thanks for your suggestion.

I have modified query with above changes and still I am getting same error.
IF object_id('tempdb..#temp') IS NOT NULL
BEGIN
	DROP TABLE #temp
END
create table #temp(ID INT IDENTITY(1, 1) ,ActID bigint)

DECLARE @v_ActID bigint;
DECLARE @v_Flag int;
DECLARE @v_UsrID bigint;
DECLARE @v_userid bigint;

SET @v_Flag=1;
SET @v_UsrID = 0;
SET @v_userid = 0;
SET @v_ActID=isnull(@v_ActID,0);

SELECT @v_ActID=ActID  from #temp WITH(NOLOCK) where id=@v_Flag

SET @v_UsrID = 0;

SELECT @v_UsrID=O_ID FROM P_Tbl WITH(NOLOCK) WHERE O_ID=@v_ActID AND UsrID=@v_userid
SET @v_UsrID=isnull(@v_UsrID,0);

IF (@v_UsrID=0)

BEGIN		
																
INSERT INTO P_Tbl (O_ID,UsrID,C_By,M_By,C_Date,ISR)
VALUES (COALESCE(@v_ActID,0),@v_userid,-1,-1,getdate(),1)

END

Open in new window

0
Randy PooleCommented:
Still you are trying to pull information from #temp and you never place any data into this table...
SELECT @v_ActID=ActID  from #temp WITH(NOLOCK) where id=@v_Flag

Open in new window

@v_ActID is always going to be null..
0

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sqldba2013Author Commented:
Thanks to all for your inputs and my issue has been resolved.
0
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