Problem With Isnull. Need To Substitute Null If A Var Is Null And Compare It To Null And Return True

Sep 20, 2006

Hey. I need to substitute a value from a table if the input var is null. This is fine if the value coming from table is not null. But, it the table value is also null, it doesn't work. The problem I'm getting is in the isnull line which is in Dark green color because @inFileVersion is set to null explicitly and when the isnull function evaluates, value returned from DR.FileVersion is also null which is correct. I want the null=null to return true which is why i set ansi_nulls off. But it doesn't return anything. And the select statement should return something but in my case it returns null. If I comment the isnull statements in the where clause, everything works fine. Please tell me what am I doing wrong. Is it possible to do this without setting the ansi_nulls to off??? Thank you

set ansi_nulls off



@inFileName VARCHAR (100),

@inFileSize INT,

@Id int,

@inlanguageid INT,

@inFileVersion VARCHAR (100),

@ExeState int

set @inFileName = 'A0006337.EXE'

set @inFileSize = 28796

set @Id= 1

set @inlanguageid =null

set @inFileVersion =NULL

set @ExeState =0

select Dr.StateID from table1 dR


DR.[FileName] = @inFileName

AND DR.FileSize =@inFileSize

AND DR.FileVersion = isnull(@inFileVersion,DR.FileVersion)

AND DR.languageid = isnull(@inlanguageid,null)




set ansi_nulls on

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Compare Null To Null

Feb 21, 2008

I want to apply something like below in my where clause:

select users.first_name

from users
where users.somecolumn = isnull(@somecolumnvalue, users.somecolumn)

The idea is to get all the values from users table if the value contained in @somecolumnvalue is null.
Now the issue is, users.somecolumn is nullable and has many rows that have null values. This query returns only those rows that have values populated in users.somecolumn.
How can the desired result be achieved?

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May 22, 2003

Hello all
I am trying to run a sql statement, (without having to run stored procedures), that will lookup a value stored in a Record.field., otherwise ignore the value if it is blank. I have a field tied to a Microsoft Access form - ItemLocation. If the user selects a unique ItemLocation the report will attempt to locate all values within that ItemLocation. If the user decides to leave the field blank, I would like for it to return all values for every ItemLocation. If anyone can help, I would really appreciate it. I will attach code. My problem is the last line of this SQL statement. If F.ITemLocation is null, I get no data. I would like for it to return everything. Thank you.

tblMISFixedAssetTable A,
tblMISFixedAssetTable2 B
WHERE A.BarCodeID = B.BarCodeID
AND A.DisposalDate is null
AND B.LastUpdate = (Select Max(C.LastUpdate)
from tblMISFixedAssetTable2 C
Where B.BarCodeID = C.BarCodeID)
AND B.BarCodeID in (Select D.BarCodeID
from tblMISFixedAssetTable3 D
Where D.FiscalYear = (Select E.FiscalYear
from tblReportFY E))
AND B.ItemLocation = (Select F.ItemLocation
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Trusted_connection=true, Login '(null)'

Mar 31, 2006

When accessing a web application from an intranet....
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My webpage displays web = domainUser  (displays the correct information).
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Oct 22, 2006

Im having some unexpected results from combining ISNULL with logical and '&&' and conditions '?:' in derived columns.

This works and returns A or B.
(ISNULL(Col1) && Col2 == "X") ? "A" : "B"

This fails returning Null when Col1 is null
(Col2 == "X" && ISNULL(Col1)) ? "A" : "B"

This fails returning null when Col1 is null
(ISNULL(Col1) && Col2 == "X") ? "A" : (ISNULL(Col1) && Col2 == "Y") ? "B" : "C"

I've applied service pack one and still have the issue. I've also tried using ISNULL in a condion like (ISNULL(Col1) ? TRUE : FALSE)

Anyone else seen this behavior?

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Oct 20, 2015

In my report i have CNAME parameter , which allows null value. I checked Allow null value check box in report parameter properties.

when i preview the report , it displays checked NULL check box beside CNAME parameter . I want to give some meaningful name(i.e.ALLCustomers) to this checkbox instead of NULL. 

Is it possible through SSRS designer?

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Jul 15, 2015

I have a flat file with the following columns

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In the flat file SampleID and Product are populated in the first row only, rest of the rows only have values for Rep_Number, Protein, Fat, Solids.

SampleID and Product are blank for the rest of the rows. So my task is to fill those blank rows with the first row that has the sampleID and Product and load into the table.

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May 3, 2007

I have a report that is run on a monthly basis with a default date of null. The stored procedure determines the month-end date that it should use should it be sent a null date.

The report works fine when I tell it to create a history entry; however, when I try to add a subscription it doesn't appear to like the null parameter value. Since I have told the report to have a default value of null it doesn't allow me to enter a value on the subscription page.

Now, I suppose I could remove the parameter altogether from the stored proc, but then the users would never be able to run the report for a previous time period. Can someone explain to me why default values aren't allowed to be used on subscriptions when they seem to work fine for ad hoc and scheduled reports? This is really quite frustrating as most of my reports require a date value and default to null so that the user doesn't have to enter them for the latest data.

An internal error occurred on the report server. See the error log for more details. (rsInternalError) Get Online Help

Key cannot be null. Parameter name: key

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Nov 5, 2007

I run a stored procedure for which I have a return variable. The stored procedure returns the ID of a row in a table if it exists:


The m_sqlCmd has been fed an SQLParameter with direction set to output.
When the stored proc returns, I want to test it. Now when there IS a row it returns the ID ok.
When the row doesn't exist, in my watch I have:

m_sqlParam.SqlValue with value {Null}

I can't seem to work out how to test this value out.
I've tried several things but none seem to work.

This line compiles ok, but the following runs into the IF statement as if the SqlValue is null??

if (m_sqlParam.SqlValue != null)....

// I'm here!! I thought the watch says this is null???

Sorry if this is obvious, but I can't work this one out!!

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Apr 2, 2007

I am getting this error: "Cannot insert the value NULL into column 'OrderID', table 'outman.outman.Contact'; column does not allow nulls. INSERT fails." -- But my value is not null. I did a response.write on it and it show the value. Of course, it would be nice if I could do a breakpoint but that doesn't seem to be working. I'll attach a couple of images below of my code, the error, and the breakpoint error.


Server Error in '/' Application.

Cannot insert the value NULL into column 'OrderID', table 'outman.outman.Contact'; column does not allow nulls. INSERT fails.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.SqlClient.SqlException: Cannot insert the value NULL into column 'OrderID', table 'outman.outman.Contact'; column does not allow nulls. INSERT fails.Source Error:

Line 89: sContact.Phone = sPhone.Text.Trim
Line 90: sContact.Email = sEmail.Text.Trim
Line 91: sContact.Save()
Line 92:
Line 93: Dim bContact As Contact = New Contact()Source File: F:InetpubwwwrootOutman KnifeCheckout.aspx.vb    Line: 91 Stack Trace:

[SqlException (0x80131904): Cannot insert the value NULL into column 'OrderID', table 'outman.outman.Contact'; column does not allow nulls. INSERT fails.]
System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +857354
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +734966
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +188
System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +1838
System.Data.SqlClient.SqlDataReader.HasMoreRows() +150
System.Data.SqlClient.SqlDataReader.ReadInternal(Boolean setTimeout) +214
System.Data.SqlClient.SqlDataReader.Read() +9
System.Data.SqlClient.SqlCommand.CompleteExecuteScalar(SqlDataReader ds, Boolean returnSqlValue) +39
System.Data.SqlClient.SqlCommand.ExecuteScalar() +148
SubSonic.SqlDataProvider.ExecuteScalar(QueryCommand qry) +209
SubSonic.DataService.ExecuteScalar(QueryCommand cmd) +37
SubSonic.ActiveRecord`1.Save(String userName) +120
SubSonic.ActiveRecord`1.Save() +31
Checkout.btnCheckout_Click(Object sender, EventArgs e) in F:InetpubwwwrootOutman KnifeCheckout.aspx.vb:91
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +105
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +107
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102

Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42

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Select NULL + 'TOTO'
----> NULL

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It's giving me an error while I'm trying to change column value from not null to null..

'tblid' table
- Unable to modify table.  

Cannot insert the value NULL into column 'ValidID', table 'Xe01.dbo.Tmp_tblid'; column does not allow nulls. INSERT fails.

The statement has been terminated.

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May 3, 2006


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

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RETURNS nvarchar(1000)
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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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Transact SQL :: Database Null Value And String Null

Oct 27, 2015

We have a case where in we should show date based on conditions for e.g if we had a column defined as

col varchar(10) then we would show col as 'NULL' for some condition and actual value when no condition

Normaly date values are stored here e.g under col 20150901 .

when col>'20150901' then 'NULL'
else col
end as Derivedcol

Note this is an extract process and we are presenting data by pumping the data in a table .

Now there is another similar column -colz varchar(10)  which stores date but doesnt have case condition so whenever date has no value its shows null which is database null.

So whats the difference between database null and string null ?

 How can we show database null for the case condition instead of string "null"?

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May 27, 2008

Hi Guys,

I have a report where some fields are blank, i need to put 0 when the field is blank, i tried the following
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this is complaining about System.DBNull is a type in system and cannot be used in comparison, what other types of fields can I use here to compare against Empty data?
is there anything basic I am missing?

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Mar 20, 2006

Hi!I have a table with a check constraint. But unfortunately it does notwork like I wanted.CREATE TABLE MAP([R_ID] [T_D_ID] NOT NULL,[R_ID1] [T_D_ID] NULL,CONSTRAINT CHECK_ID1 CHECK (R_ID1 = R_ID OR R_ID1 = NULL),CONSTRAINT [PK_MAP] PRIMARY KEY ([R_ID]))R_ID1 should always have the value of R_ID or NullThe following statements should cause errors:insert into map (R_ID, R_ID1)values(1,2);update map set R_ID1=3 where R_ID=1;But there occur no errors. Does anyone have an idea? It is an SQL Server2000.TIASusanne

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The result of A+B concatanation will be stored in a column, C.

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Apr 25, 2007

Hi guys,

I've got a query on a particular table returning an odd result:

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WHERE WorkStation Is Not Null
ORDER BY WorkStation

This query returns the rows I'd expect plus a null row. This doesn't happen in databases at other sites, or in other tables at this site. The following query behaves as I'd expect returning only non-null AccountNumbers.

FROM Suppliers
WHERE AccountNumber Is Not Null
ORDER BY AccountNumber

I can't reproduce these results on another site on a table of the same structure, or on another table at this site.

Any suggestions as to what might be going on?

Pertinent info:
select @@Version

Microsoft SQL Server 2000 - 8.00.760 (Intel X86)
Dec 17 2002 14:22:05 Copyright (c) 1988-2003 Microsoft Corporation
Standard Edition on Windows NT 5.2 (Build 3790: Service Pack 1)
dbcc checkdb
Abridged result:
CHECKDB found 0 allocation errors and 0 consistency errors in database 'POS'.

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Does not reproduce this problem (and so is a probable fix) but the questions remains, what causes this?


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Apr 27, 2007

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Feb 28, 2008

Hi all,

One of my columns is the table has some Null values, and I Would like to stop having NULL values into that column any more.

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Aug 15, 2006

ok here is a WIERD issue.

I've NEVER EVER had this issue, I have always done this and it works great both locally and remotely.


I have a table, which is a "customers" table.

I have a stored procedure which takes in parameters (name, address, password etc...) and returns me back, via a parameter declared as output - the customer ID.

I've always done this, and works great.

Now, this works fine locally.


IF I try to run this/do the exact same execution of commands (create a customer) remotely (where the database is stored, so copying everything from local to "over there") it does not work.

I get a DBNULL value back from the parameter, declared as an int output.


IF I copy and paste this Stored procedure Query/command into Query Analyzer and execute it (on the remote connection) and run it, giving it the exact same values as I do, it works perfect and returns me the correct value.


I've even dropped and recreated the stored procedure but makes no difference.


Any ideas why?


here is the proc....


CREATE PROCEDURE [dbo].[DoCreateNewCustomer] (
@theFirstName nvarchar(25),
@theLastName nvarchar(25),
@theAddress nvarchar(50),
@theCity nvarchar(15),
@thePostCode nvarchar(9),
@thePhoneNumber nvarchar(21),
@theMobilePhoneNumber nvarchar(21),
@theIPAddress nvarchar(25),
@thePassword nvarchar(50),
@theEmailAddress nvarchar(30),
@result int output
SET @result = (SELECT [ID] FROM Customers WHERE emailAddress = @theEmailAddress)
IF @result IS NOT NULL 
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 INSERT INTO Customers (




Any ideas why it does not work when calling the stored proc from either a web app, or through QA remotely but works fine when I run that command in QA or locally?


Again, if I do:


EXEC DoCreateNewCustomer { params } - the output result it gives me is DBNULL (if on remote connection)

If I do this locally, perfect


If I copy and paste pretty much the SP into QA and execute it on the remote connection, works great, and also locally.

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Sep 6, 2005

I am working on a web application for a company that uses an existing company database. I just found out before the long weekend that a couple hundred of the items in the table aren't completely related.

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