Quick Question... How To Use Default Values (after Allowing NULL)
Oct 17, 2005
Hello,
I have a BIT column which accepts NULL values.
What would be a good method to allow an INSERT (or UPDATE) statement to insert NULL into this column but then automatically change the NULL to 0 (zero). In other words, test for NULLs after INSERT (or UPDATE) and change the value to 0 (zero).
Not exactly sure how to do this with a Trigger. Also, what is that [Formula] option used for (column properties in the Table Design view)... and would this apply with my problem?
Thanks,
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Aug 1, 2007
I have a flat file that I'm reading from and loading my tables with. In that file I have a column that has numbers (2000,1999,1998 and so on) and the column that they are being loaded into is defined as an INT. The issue I'm running into is that the first 50 or so rows in the flat file is empty for this column so I'm getting an error message. If I put numbers in that column in the flat file it works, if i remove them it fails. How can I allow for NULL values for my INT column on the database table?
here is the error I'm getting:
[OLE DB Destination [182]] Error: There was an error with input column "SalesYear" (7259) on input "OLE DB Destination Input" (195). The column status returned was: "The value could not be converted because of a potential loss of data.".
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Dec 28, 2006
Hello,I have a foreign key constraint between two tables (Appointments andMissedAppointmentReasons) and I'd like to allow null values in Appointmentstable for the field containing the MissedAppointmentReason, but currently, Iget a Foreign Key Constraint Error when I try to add a record to theAppointments table.Any ideas how I can have the null values but still maintain the Foreign KeyConstraint?Thanks!Rick
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Dec 22, 2006
I have a stored procedure with a SELECT statement, that retrieves 1 row.
SELECT name FROM tblNames WHERE nameID = "1"
I want all the NULL values in that row to be change in some default values.
How do I do this?
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Oct 22, 2007
Hi,
I have the following problem: I'm connected to flat file source and trying to read data that is later inserted in an MS Access database. Everything wokrs fine instead of one thing - when I have null values in the flat file, I want those NULL values to be inserted in the MS Access db, instead of that what happens is that I actually get the default values for a column type from the flat file and later insert that defalut value. For example if I have a null value in an four-bite-signed-integer column of the flat file, I get 0 as value.
I thouth of solution using a "Derived Column" transformation which can transform the zeros into nulls, but decided to check with you guys if there is a smarter thing to do (for example to edit the flat file source to read the NULLs correctly).
Any advice is appreciated! Many thanks
Ventsy
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Feb 9, 2005
'XXX_DTE' is character type which wont take NULL.
SELECT CONVERT(Datetime,XXX_DTE) FROM XXXX
I get result as : 1/1/1900
Why is it so.....
What I expect is '0000-00-00 00:00:00.000'
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Jun 6, 2006
Hi,
I have a data transform from a flat-file to a SQL server database.
Some of the flat-file fields have NULL values. The SQL table I'm
importing into does not allow NULL values in any field, but each field
has a Default value specified.
I need to have it so that if a null value comes across in a field using
the data transform, it takes the table default on import. I could of
sworn I had this working a few days ago, but I get errors now that
state I'm violating table constraints. Has anyone done this before?
Thanks
Jeff
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Aug 8, 2007
Hi
I am using this query to alter a table
ALTER TABLE myTable ADD age int NULL DEFAULT(0)
But above query is adding age field by storing Nulls but not with default values
So I need to add age field to the table by storing default value as 0 and by allowing Nulls
Please advice
Thanks
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Aug 4, 2007
My users want to be able to enter nothing in a date field.
I'm using asp.net v2, vb.net, and VS 2005 for my application. I'm not sure what to do or what code to write to allow the user not to enter a date and keep from hitting the sqldatetime overflow error.
I could use some help.
Thanks
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Sep 27, 2007
I have an SP that I call via table adapter. If I do not pass a value in the string field ('eventRef'), the SP never gets called - it appears that the table adapter is filtering it...? I need to be able to count records that have an 'eventRef' = to the one I pass, including null. This works fine if I pass an 'eventRef', but never runs if that parm is empty.
Here is the TA definition
<asp:ObjectDataSource ConvertNullToDBNull="true" ID="ObjectDataSource1" runat="server" SelectMethod="GetData" TypeName="ImagesByEventTableAdapters.PagedImagesByEvent" OnSelecting="ObjectDataSource1_Selecting" OnSelected="ObjectDataSource1_Selected">
<SelectParameters>
<asp:QueryStringParameter Name="CategoryID" QueryStringField="CategoryID" Type="Int32" DefaultValue="24"/>
<asp:QueryStringParameter Name="EventID" QueryStringField="EventID" Type="Int32"/>
<asp:QueryStringParameter Name="EventRef" QueryStringField="erf" Type="String"/>
<asp:QueryStringParameter Name="PageIndex" QueryStringField="PageIndex" Type="Int32" DefaultValue="0"/>
<asp:Parameter Name="NumRows" Type="Int32" DefaultValue="16"/>
<asp:Parameter Name="ImageCount" Direction="Output" Type="Int32" DefaultValue="0" />
</SelectParameters>
</asp:ObjectDataSource>
And the SP:
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go
ALTER PROCEDURE [dbo].[PagingGetProductsByEvent]
@CategoryID INT,
@EventID INT,
@EventRef CHAR(10)=NULL,
@PageIndex INT,
@NumRows INT,
@ImageCount INT OUTPUT
AS
BEGINdo my stuff....
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Jan 25, 2008
I have a pivot transform that pivots a batch type. After the pivot, each batch type has its own row with null values for the other batch types that were pivoted. I want to group two fields and max() the remaining batch types so that the multiple rows are displayed on one row. I tried using the aggregate transform, but since the batch type field is a string, the max() function fails in the package. Is there another transform or can I use the aggragate transform another way so that the max() will work on a string?
-- Ryan
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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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Aug 3, 2005
hi,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
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Aug 2, 2015
I have 595 default constraints in my database. I can return a list of them using the following:
select * from sys.default_constraints
Is there a way I can return a list of just the ones where NULL is still allowed? I want to update all of the columns with a default value to not allow NULLs.
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Apr 11, 2008
I have my stored procedure set to
Territory_code IN (@Territory)
, now , how do i enter in more then one value. When i select the multi value check box, it gives me more spaces. But then doesnt recognize the values when i put in more then one. am i doing something wrong?
The field is a Varchar 20
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May 30, 2014
I am working with SP. How can we find out values of parameters when the SP is executed with the default values?
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Mar 18, 2007
A have a multi-valued parameter (B) which is dependent on a single-valued parameter (A) on my report. When a value is selected in A, I want all matching values in B to be selected by default and the "Select All" option checked. To do this I have set the Default Values section in B to point to the same dataset as the "Available Values" section. Both A and B have default values so the report runs automatically.
One of the values in parameter A (say Value1) yields more values in parameter B than the other (say Value2).
If I run the report the first time with Value1 selected as the default for parameter A, all values in B are checked correctly. If I run the report with Value2 selected the first time and then change the selected value to Value2 and run my report, all values in B are displayed but only the values that were previously checked (when Value1 was selected), are now checked, leaving the "Select All" unchecked.
What am I doing wrong? Why are all the values in B not checked? The dataset is the same in "Available Values" section and "Default Values" section.
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Feb 23, 2007
I have a DTSX package which reads values from a fixed-length text file using a data reader and writes some of the column values from the file to an Oracle table. We have used this DTSX several times without incident but recently the process started inserting NULL values for some of the columns when there was a valid value in the source file. If we extract some of the rows from the source file into a smaller file (i.e 10 rows which incorrectly returned NULLs) and run them through the same package they write the correct values to the table, but running the complete file again results in the NULL values error. As well, if we rerun the same file multiple times the incidence of NULL values varies slightly and does not always seem to impact the same rows. I tried outputting data to a log file to see if I can determine what happens and no error messages are returned but it seems to be the case that the NULL values occur after pulling in the data via a Data Reader. Has anyone seen anything like this before or does anyone have a suggestion on how to try and get some additional debugging information around this error?
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Dec 9, 2013
I have SQL Server 2012 SSIS. I have Excel source and OLE DB Destination.I have problem with importing CustomerSales column.CustomerSales values like 1000.00,2000.10,3000.30,NotAvailable.So I have decimal values and nvarchar mixed in on Excel column. This is requirement for solution.However SSIS reads only numeric values correctly and nvarchar values are set as Null. Why?
CREATE TABLE [dbo].[Import_CustomerSales](
[CustomerId] [nvarchar](50) NULL,
[CustomeName] [nvarchar](50) NULL,
[CustomerSales] [nvarchar](50) NULL
) ON [PRIMARY]
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Mar 29, 2006
Hi
can somebody explain me how I can assign a NULL value to a datetime type field in the script transformation editor in a data flow task.
In the script hereunder, Row.Datum1_IsNull is true, but still Row.OutputDatum1 will be assigned a value '0001-01-01' which generates an error (not a valid datetime). All alternatives known to me (CDate("") or Convert.ToDateTime("") or Convert.ToDateTime(System.DBNull.Value)) were not successful.
Leaving out the ELSE clause generates following error: Error: Year, Month, and Day parameters describe an un-representable DateTime.
If Not Row.Datum1_IsNull Then
Row.OutputDatum1 = Row.Datum1
Else
Row.OutputDatum1 = CDate(System.Convert.DBNull)
End If
Any help welcome.
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Nov 9, 2000
Hi,
My query "select blah, blah, rank from tablewithscores" will return results that can legitimately hold nulls in the rank column. I want to order on the rank column, but those nulls should appear at the bottom of the list
e.g.
Rank Blah Blah
1 - -
2 - -
3 - -
NULL - -
NULL - -
At present the NULLs are at the top of the list, but I do not want my ranking in descending order. Any suggestions?
Thanks
Dan
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Apr 23, 2008
I have a table that has a date field that can't be null. When a new record is created, if a date is not passed in, I want the default to be the current date. How can I set that? I tried Now, Today, GetDate, etc. Diane
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Feb 3, 2005
Hi
I have a table with the list of employee and 15 column with data type float or money , that represent the number of hours, airfare,gas,parking food, etc....
I have 2 choice:
-Put 0 as a default value for each column, like that I do not have to use coalesce when I do SUM for each column.
-Leave the default value null but I will have to use coalesce.
In term of performance, what is the best solution?
Thanks
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Aug 10, 2007
If no value is supplied on an insert for an int column that allows nulls, will the value be null or 0 ?
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Aug 1, 2006
I am designing a new table with a few columns that may or may not havea value on each row that is inserted.What issues determine whether to allow a NULL value to be inserted forthat column or define a default value to be used?I want to think through the repercussions of this decision before I getinto production.
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Jan 29, 2008
I have defined 8 varchar columns as not null with default, i.e.
[Namad8] [varchar](40) COLLATE Latin1_General_CI_AS NOT NULL DEFAULT (' '),
I run a script transformation (Flat file source, OLE DB dest) that splits a crlf delimited field an array, and then loads each array element into one of the not null table columns as above. However there may be less than 8 elements present in the input field, which means the remaining columns are not populated.
When I run the data flow task, I get the error
"
Error: 0xC020901C at Capture Assessments, OLE DB Destination 1 [1]: There was an error with input column "Namad8" (24) on input "OLE DB Destination Input" (14). The column status returned was: "The value violated the integrity constraints for the column.".
I know I'm trying to insert a null value into the column, but my understanding was that SQL would default the column to spaces. If I define the column to allow nulls, the data flow works fine.
Any idea what I'm doing wrong here?
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Dec 5, 2007
hi,
I am using sql as a back-end server. My application requires to insert a default string values when the user do not provide any input or if the inpur is NULL. I have used the following code, but the defaul values are not inserted. I am not getting the desired result.
CREATE TABLE Employees1 (
EmployeeName varchar(50),
State char(3) NOT NULL DEFAULT 'NSW' ,
PostalCode int default 2000,
Country varchar(32) NOT NULL default 'Australia');
insert into Employees1 values ('diana', ' ' , 2,' ' )
The output is: EmployeeName State PostalCode Country
diana 2
Can anyone tell me what is that i am missing?
regards
Nongban
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Apr 25, 2001
how can you alter a table so that you can add a default value whenever the field is NULL? for example, whenever the table is brought up in a query, NULL is replaced with UNKNOWN
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Feb 14, 2008
Is there any way to make a column to accept NULL but stores it as default value of Column Property?
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Sep 23, 2014
I have a Nullable columns. I want the value to be zero if NULL is passed.
1) having a view for every such table,
2) using ISNULL for needed columns in that view
3) using those view for inserts instead of using tables directly.
This way i can reduce the number of places to use ISNULL in all my SPs.I dont want to make it to NOT NULL, as my application impact will be high. And Default constraint does not work here.
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Nov 13, 2007
Hi,I am using SQL Server 2005 32 bit version. Could any one clarify methe caption database option with some examples? I am quite confusedwith the explanation given in MSDN. Kindly help me.Thanks in Advance.Om Prakash
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Feb 18, 2008
Hello
I've written a stored procedure with 4 parameters
create procedure dummy
( @a int, @b int, @c varchar(50), @d varchar(50))
now from front end(I'm using c#.net)
I want to send the values according to some criteria
So in the process...I've only values for @a & @c ...
so In order to reduce the code of sending Null values explicitly to other parameters...
can't I set like default values for it so that If I don't send values to certain parameters it will have the default value or Null value.
like I want something like this:
create procedure dummy
( @a int NULL, @b int NULL, @c varchar(50) NULL, @d varchar(50) NULL)
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