Checking For NULL Within An Expression
Mar 5, 2007Hi All,
I would like an example of checking for NULL within an expression. I don't know the correct syntax. Checking for IsNull is incorrect so is IS Null. Can anyone help me?
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Checking For Null
May 23, 2008I have a table that I know has a null or nothing in a field. When I run this query to get a list of them nothing comes back at all but it doesn't error out. Any ideas?
select *
from lab_test_add_conf
where table_name = null
order by lab_test_conf_id
Checking For Not Null
Apr 1, 2008Hi,
How can I check in a conditional split for fields not null? I see where I can use the isnull() function but I need to check for is not null.
Checking For Null Statement In Sql
Feb 16, 2006Hi Everyone,
I have a query
select name, address, city from table1
I want to append address +'-' + city in this query . I want to show hyphen only if both address and city are not null. If name is null then I don't want to show hyphen. How can I get around this problem.
Any help will be appreciated.
Thanks,
Vinki
Problem In Checking Null Record
Apr 30, 2007Hello, I am using sql server 2000 as my backend.If there is any null record in my table , I am getting following error:*********** Conversion from type 'DBNull' to type 'String' is not valid. ************** to overcome this error I want to check if its null then don't do anything else do something.I have tried like this:If rs.fields("ph").value="NULL" thenelse.................end if But this does not solve my problem.Please help me i anyone can.Thanks.
View 1 Replies View RelatedChecking If String Is NULL Or EMPTY In SQL
Nov 9, 2007I need to check in my Stored procedure if the information passed is null or empty so I can decided to insert the new value or keep the old. How do I accomplish this please in T-SQL. Thanks in advance.
View 6 Replies View RelatedChecking For Null Values In A Table/Matrix Cell
Jun 12, 2007What would be an equivalent expression for ISNULL(datafield, 0) for a table/matrix cell? I am using iif( Len().. to find out if there is something in the cell, and displaying zero in the cell if the length of cell item is 0, however am wondering if there is any better/elegant way of doing that?
Conditional Execution With Null Checking For DateTime Field
Mar 11, 2008There was a similar question to mine a few time ago about conditional execution, but I'm having some problems with it to which I couldn't find any answer, could anyone help?
My condition is checking if a DateTime from a DB table is null. I use the Execute SQL Task to retrieve the record (SELECT TOP 1 * FROM myTable WHERE conditions = TRUE), then I map 2 fields to their respective global variables.
Then I created the green arrow connector and used a precedence expression based on sucess. I used the expression IsNull(@variable). For some reason, even if the @variable comes as null - I checked the info in the DB - it still comes out as '1999-11-30'
I've looked around and the IsNull method can be used to also change the value in the event of it being null, could it be changing my variables value to this even if I didn't pass that value as a parameter to the function? If so, how else can I test it for null? I've tried "== null", "= null" and even ".equals(null)" - which I know is absurd, but I'm running out of options here...
Could you enlighten me, please???
Thanks in advance!
Checking Specific Columns Were NULL On Previous Insert (Using If EXISTS)
Aug 3, 2007Thanks for your time:
Background: After Insert Trigger runs a sproc that inserts values into another table IF items on the form were
populated. THose all work great, but last scenario wont work: Creating a row insert based on Checking that all 22 other items from the prior insert (values of i.columns) were NULL:
IF EXISTS(select DISTINCT i.notes, i.M_Prior, i.M_Worksheet, ...
from inserted i
WHERE i.notes IS NOT NULL AND i.M_Prior = NULL AND i.M_Worksheet = NULL AND...)
BEGIN
Insert into dbo.Items2Fix ...
From inserted i
END
Look For Null Value In A Conditional Expression
Mar 9, 2008Hi,
I need to create a conditional expresssion where if a null value is found, then a letter "N" must be inserted.
I create this expression but didnt work: (COL1 == NULL) ? "N" : COL1
So, if COL1 is null, then N .. but if it is nt null tehn COL1 = COL1
I think i', having a problem expressing the null.
Any idea for this?
Thanks!
Transact SQL :: CASE Expression - NULL
Jun 19, 2015DECLARE @I1 VARCHAR(5),
@I2 VARCHAR(5)
;
WITH cte
AS (SELECT 1 AS i,
'val1' AS j UNION ALL
SELECT 2,
'val2')
[code]....
Why @i1 is null but not @i2 ? I'm trying to assign values after grouping by the column.
Returning A NULL Value In An SSIS Expression
Dec 5, 2006Greetings SSIS friends,
I have the following expression but it doesn't seem to evaluate
findstring(eventstatus, "O", 1) > 0 ? "OFF" : NULL(DT_STR, 30, 1252)
All I want to do is something like :
All I want to do is return a NULL value if my condition is false.
Your help would be appreciated.
Indicating The NULL Value In Report Expression Syntax
Sep 12, 2007Hi,
I would like to know how I can indicate a NULL value in a report expression in SSRS / Report Designer.
I am trying to code :
IIF(Value_A = 0, <NULL>, Value_A)
It may look weird but I am trying to return NULL values when Value_A is 0 (zero), in the sample scenario above.
I have tried using the keyword "NULL", but it is highlighted as a syntax error, and suggested to use System.DBNull. I tried it and then it says that components of the System collection cannot be used in an expression, so I am left drawing blanks.
Thanks.
regards,
Kenny
Conditional Split - Expression Evaluates To Null
Sep 5, 2007
Hi everyone!
I'm using a conditional split to discriminate modified records. My expression looks like this:
col1_source != col1_dest || col2_source != col2_des.....and so on. I use OLE DB Command afterward to update modified records.
It all works fine if no columns evaluate to null. If any (source or dest.) evaluates to null, component fails.
Any tips how to solve a problem?
It has to work like this:
If colX_source is null and colX_dest is not null --> Update
If colX_source is not null and colX_dest is null --> Update
If both colX_source and colX_dest are null --> No update
p.s. i apologize if a similar thread exists, I haven't found something of use to me.
How To Give The Null Value In The Derived Column Expression Value
Aug 25, 2006Hi I want to pas one Derived Column Value is "Null" Default . How to Give the Expression "
For Example"
The Derived Column i gave one Column Name
Derived Column Name Expression Data Type
Price ""
Any one give me the Solution
How To Check Null Or '' In Date Field In Expression And ...............
Aug 16, 2006I have a column say 'ActivationDate' which is a (database timestamp [DT_DBTIMESTAMP]) which I want to replace with an expression in derived columns
The condition is if 'ActivationDate' field is null or '' then 'Null' else 'ActivationDate'
I am struggling to write this condition. Without condition i.e. at present it saves the value in this database '1753-01-01 00:00:00.000'.
In the preview the 'ActivationDate'field does not show any thing so I recon it is either null or ''
Problem With Isnull. Need To Substitute Null If A Var Is Null And Compare It To Null And Return True
Sep 20, 2006Hey. 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
go
declare
@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
where
DR.[FileName] = @inFileName
AND DR.FileSize =@inFileSize
AND DR.FileVersion = isnull(@inFileVersion,DR.FileVersion)
AND DR.languageid = isnull(@inlanguageid,null)
AND DR.[ID]= @ID
)
go
set ansi_nulls on
URGENT - My Error Or Bug? The Result Of The Expression Cannot Be Written To The Property. The Expression Was Evaluated, But
Feb 8, 2007Error 3 Error loading MLS_AZ_PHX.dtsx: The result of the expression ""C:\sql_working_directory\MLS\AZ\Phoenix\Docs\Armls_Schema Updated 020107.xls"" on property "ConnectionString" cannot be written to the property. The expression was evaluated, but cannot be set on the property. c:documents and settingsviewmastermy documentsvisual studio 2005projectsm l sMLS_AZ_PHX.dtsx 1 1
"C:\sql_working_directory\MLS\AZ\Phoenix\Docs\Armls_Schema Updated 020107.xls"
Directly using C:sql_working_directoryMLSAZPhoenixDocsArmls_Schema Updated 020107.xls
as connectionString works
However - I'm trying to deploy the package - and trying to use expression:
@[User::DIR_WORKING] + "\Docs\Armls_Schema Updated 020107.xls"
which causes the same error to occur
(Same error with other Excel source also:
Error 5 Error loading MLS_AZ_PHX.dtsx: The result of the expression "@[User::DIR_WORKING] + "\Docs\Armls_SchoolCodesJuly06.xls"" on property "ConnectionString" cannot be written to the property. The expression was evaluated, but cannot be set on the property. c:documents and settingsviewmastermy documentsvisual studio 2005projectsm l sMLS_AZ_PHX.dtsx 1 1
)
Reporting Services :: Running Value Expression Within Lookup Expression In SSRS?
Oct 28, 2015I have created 1 report with 2 datasets. This report is attached to the 1st dataset.For example,1st one is "Smallappliances", 2nd is "Largeappliances".
I created a tablix and, the 1st column extracts Total sales per Sales person between 2 dates from 1st dataset (Small appliances). I used running values expression and it works fine.
Now, I would like to add another column that extracts Total sales per sales person between 2 dates from 2nd dataset (Large appliances). I am aware that I need to use Lookup expression and it is giving me the single sales value rather than the total sales values. So, I wanted to use RunningValue expression within lookup table to get total sales for large appliances.
This is the lookup expression that I added for the 2nd column.
=Lookup(Fields!salesperson.Value,Fields!sales_person.Value,RunningValue(Fields!sales_amount.Value,
sum, " sales_person"),
"Largeappliances").
I get this error when I preview the report.An error occurred during local report processing.The definition of the report is invalid.An unexpected error occurred in report processing.
(processing): (SortExpression ++ m_context.ExpressionType)
Reporting Services :: Give Meaning Full Name To Allow Null Value Check Box In Report Parameter Instead Of NULL?
Oct 20, 2015In 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?
Integration Services :: SSIS Insert Non Null Value Into Null Rows
Jul 15, 2015I have a flat file with the following columns
SampleID Rep_Number Product Protein Fat Solids
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.
Subscription Issue With Null Default Parameter - Key Cannot Be Null
May 3, 2007I 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
Returned SQLParam.SqlValue Is {Null} But Can't Test For Null?
Nov 5, 2007I 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:
m_sqlCmd.ExecuteScalar();
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!!
Any Improvements To This: Cannot Apply Value Null To Property Login: Value Cannot Be Null.
Mar 26, 2007Looks like there was a fix and then I read this fix is not a fix. Does anyone know how this can be rectified? Does it mean that only Windows authentiation is the only way it works. The Software is over 2 years old, there are no excuses.
Cannot Insert The Value NULL Into Column 'OrderID' -- BUT IT IS NOT NULL!
Apr 2, 2007I 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
Help Altering Database Table From NULL To NOT NULL
Jun 28, 2004I would drop and add the table but the data can't be deleted. So if anyone could help with the statement it would be greatly appreciated. Thanks
View 7 Replies View RelatedSp_option... 'concat Null Yields Null'
Feb 26, 2004I'm trying to set the concat... option to OFF
all the time and in all my databases
I tried this command
USE master
EXEC sp_dboption 'DatabaseName', 'concat null yields null', 'FALSE'
but it doesn't change anything
Select NULL + 'TOTO'
----> NULL
(it should be 'TOTO')
Change Not Null To Null, Default Value To Empty
Aug 3, 2005hi,my structure table in database:Amount float(53) not null default 0when i try to run his script:alter table ABC alter column Amount float(53) nullit can only set the Amount to allow null, but can't set the defaultvalue to empty.anyone know how to set the field to allow null and default set toempty, no value.thanks
View 5 Replies View RelatedDB Engine :: Not Able To Make Column To Null Value From Not Null
May 13, 2015It'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.
WITH RETURNS NULL ON NULL INPUT Not Working?
May 3, 2006Hello.
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?
Transact SQL :: Database Null Value And String Null
Oct 27, 2015We 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 .
Case
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"?
Checking For PK
Feb 10, 2004Hi,
I want to assign a list columns to be the PK on a table. I don't know what this list of columns would be.How do I go about figuring that?
Sample Data
Col1...Col2...Col3..Col4
1...........2.......A......X
1...........2........B.....X
1...........2.......A......Y
As you can see Col1 & Col2 ONLY do not make up the PK. I need to include Col3 as well. My concern is I am not sure if I have a row like..
1...........2.......A......X reapeated lower down the order. So how do I figure the PK out?
Thanks
Adding Null And Non-null Columns Together ----??
Nov 27, 2000I have two columns A (which allows nulls) and B( which does not allow nulls).
How can I add the contents of columns A and B SO THAT I DO NOT GET A NULL RESULT WHEN A IS NULL.
The result of A+B concatanation will be stored in a column, C.
Appreciate your help
Ziggy