Date IS NULL Not Working......?

Jul 20, 2004

Hi,

I have a problem with a SQL that check if a date column IS NULL.
On one server the check work ok but on another (the same data is on both - restored copy) the check does not find any NULL values.
If check where datecolumn =convert(datetime,'9999-12-31 23:59:59.000',121) I get the same result as when checking for NULL in the other.

Is there any parameter set somewhere that tell the server to return a value even if NULL is stored in the database?

thank you for reading,
YakoBay

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Hello.

I've built a sample CLR function with the following declaration....

CREATE FUNCTION GetManager(@DeptCode nvarchar(3))
RETURNS nvarchar(1000)
WITH RETURNS NULL ON NULL INPUT
AS
EXTERNAL NAME Assembly1.[ClassLibrary1.MyVBClass].MyManager

And it works as expected, except when I use NULL:

DECLARE @MyManager nvarchar(1000)
EXEC @MyManager = dbo.GetManager NULL
PRINT @MyManager

It returns the value "Unknown" as it would have for any unknown DeptCode, as-programmed.

I'm of the theory it should have returned NULL without actually firing the function? Or is this only for non-CLR items... or stored procedures, not functions?

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USE [XXX]
GO
/****** Object:  UserDefinedFunction [dbo].[CalculateNumberOFWorkDays]    Script Date: 10/28/2015 10:20:25 AM ******/
SET ANSI_NULLS ON
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[code]...

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I'm building a stored procedure to edit a row in my database but first I'm wanting to check for null values in the parameters and set them to their respective value in the row I'm attempting to edit.

Here's my code:

Code:

CREATE PROCEDURE dbo.spModifyProject
(
@ProjectID int,
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@Description nvarchar(50),
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@ProjectLead nvarchar(50),
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AS

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I get syntax errors in two places. The first is near Null and the second is near END. Any help you can give is appreciated.

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Jul 3, 2006

I'm building a stored procedure to edit a row in
my database but first I'm wanting to check for null values in the
parameters and set them to their respective value in the row I'm
attempting to edit.



Here's my code:

Code: CREATE PROCEDURE dbo.spModifyProject
(
@ProjectID int,
@Title nvarchar(50),
@Description nvarchar(50),
@DueDate smalldatetime,
@ProjectLead nvarchar(50),
@Completed bit
)

AS

IF @Title IS Null Then
SET @Title = (SELECT Title FROM Projects WHERE [ID] = @ProjectID)
END IF



I get syntax errors in two places. The first is near Null and the second is near END. Any help you can give is appreciated.

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[code]...

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Hi everyone,

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If I join the tables so that the step date is between the start and end dates of the project, then I get no step information for the cases where the end date is NULL (that is, where the project hasn't ended yet).

Does anybody have any ideas?

Here are my tables, the query that shows the main idea (with the wrong result), and my expected results.

Thank you for reading.


--- create sample data
set dateformat ymd

declare @caseinfo table (caseid int, startdate smalldatetime, enddate smalldatetime)

insert @caseinfo
select 10, '2006-12-23', '2006-12-27' union all
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select 30, '2006-12-23', NULL union all
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insert @steps
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select 10, 2, '2007-1-3' union all
select 10, 3, '2007-2-5' union all
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select 20, 3, '2007-1-9' union all
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--- the main idea (with the wrong results)

select *
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--- expected result

declare @expresult table (caseidexp int, startdateexp smalldatetime, enddateexp smalldatetime, stepnumberexp int, stepdateexp smalldatetime)

insert @expresult
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*********************************************

=IIF(isdate(Fields!DueDate.Value), ................

********************************************

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