Parameterizing Allow Nulls Columns
Jul 21, 2006
Here's a question I though would be common but can't find an answer to!
My select statement, which pulls from SQL Server tables, has a column which allows nulls. When I try to add a parameter to this column, it no longer returns rows that have null in that column when I test it with the default value of %. I want it to return all the records.
SELECT Jobs.JobID, Jobs.JobName, Engineers.Engineer FROM Jobs LEFT OUTER JOIN Engineers ON Jobs.AccountManager = Engineers.ID WHERE (Engineers.Engineer = @Engineer)
Parameter is;
ConvertEmptyStringToNull = True
DefaultValue = %
Direction = Input
Name = Engineer
QueryStringField = Engineer
Size = 0
Type = Empty
When I run this I get no records! Isn't % suppose to return anything including nulls?
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Jul 13, 2015
Basically I need to get the SUM of the sum of three columns and all three columns have nulls. To make it more complicated, the result set must return the top 20 in order desc as well.
I keep facing different issues whether I try and use Coalesce, IsNull, Sum, count, anything. My query never returns anything but 0 or NULL regardless of if I am trying to build a CTE or just use a query.
So I'm using Col A to get the TOP 20 in order (which is fine) but also trying to add together the sums of Col A + Col B + Col C for each of the twenty rows...
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Jun 13, 2006
Why is it that when I include a column from my SQL Server database table, which has it's Allow Nulls checked, in the data source of a control that the record becomes not update-able? How do I get around this?
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Jun 20, 2008
Hi Guys.
I have a problem. I have two feilds in a table. Both of them are (int). I want to be able make sure the same number is not put in both columns for each row. Both colums have to be a different number, and also if one is null, the other cannot be. How do I go about enforcing this policy?
For Example:
This is what I want
ID Column1 Column2
--- -------- ---------
1 5 8
2 5 7
3 null 10
4 6 2
This is what I DO NOT want:
ID Column1 Column2
--- -------- ---------
1 5 5
2 5 5
3 7 7
4 null null
I created a unique constraint between the 2 columns, but it still allows dups within the row. Please help me.
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Mar 10, 2008
Hi,
I have an SSIS Package. I am using script component to loop through input columns and their values. I am not able to do Null checking. The code is as below. In place of dashes , I want to do null checking but am not able to do. I tried vbNull, IsNull, TypeOf, System.dbNull but nothing is working. I guess am missing something here. Can anyone help me with this.
For Each column In Me.ComponentMetaData.InputCollection(0).InputColumnCollection
columnValue = rowType.GetProperty(column.Name)
If Not --------------- Then
RowData += ((FormatElement(column.Name) + ReplaceSpecialChars(columnValue.GetValue(Row, Nothing).ToString()) + FormatElement(column.Name, True)))
End If
Next
Thanks in Advance.
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Apr 3, 2007
Hi there,
I'm trying to unpivot a table in SSIS: The pivoted table basically looks like
ID DATE1 TEXT1 DATE2 TEXT2
----------------------------------
ID1 D1 T1 D2 T2
...
The unpivoted result looks like
ID DATE TEXT
-------------------
ID1 D1 T1
ID1 D2 T2
€¦
It works, but the one problem I am facing is: If D1 IS NULL in the pivoted table then D1 in the unpivoted table contains some strange value that is neither NULL nor a valid datetime. In a data viewer I get the in the DATE field "Fehler: Die Parameter Year, Month and Day beschreiben eine nicht darstellbare Datetime." (i. e. "Error: The parameters Year, Month and Day form an invalid datetime."). The loading of the OLE DB target yields an error because the DATE value cannot be converted to a valid datetime.
Anybody having a solution to this?
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Jun 4, 2007
I am running into an issue when adding data from multiple columns intoone alias:P.ADDR1 + ' - ' + P.CITY + ',' + ' ' + P.STATE AS LOCATIONIf one of the 3 values is blank, the value LOCATION becomes NULL. Howcan I inlcude any of the 3 values without LOCATION becoming NULL?Example, if ADDR1 and CITY have values but STATE is blank, I get aNULL statement for LOCATION. I still want it to show ADDR1 and CITYeven if STATE is blank.Thanks
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Jun 22, 2015
I am facing problem in odbc driver.
Odbc driver:CIW
In ssis i am using ado.net and selecting odbc driver i am giving select statement which is having 100 columns in that 50 columns values are NULLS Its giving error saying Null columns not found.
If i add column s which are non null no error .error with null values.
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Jun 9, 2006
I'd like to know what's the best practice in parameterizing SQL connection in SSIS so that we can move from Dev to QA and to Production easily.
Thanks,
Tommy
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Oct 31, 2006
I'm pararmeterizing a SQLDataSource, but I've encountered a problem. The users want all records returned if no ID is provided. So when they first hit the page, they will see all records, then they can filter down to one ID if needed. However, if I add a selectparameter of ID, I have to default it to a value, which won't give the users all records. Suggestions?
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Aug 16, 2007
Hi,
I am creating a data set for a ROLAP report which executes a dynamic SQL using EXEC. I am finding problems parameterizing multi-valued report parameters in the SQL being executed through EXEC.
To consider a sample code:
EXEC('select * from country where country_key in ('+@country+')')
where @country is a multi-valued report parameter.
Regards,
Emil
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May 16, 2006
When i do a select on my emplee table for rows with null idCompany i dont get any records
I then try to modify the table to not allow a null idCompany and i get this error message:
'Employee (aMgmt)' table
- Unable to modify table.
Cannot insert the value NULL into column 'idCompany', table 'D2.aMgmt.Tmp_Employee'; column does not allow nulls. INSERT fails.
The statement has been terminated.
This sux
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Feb 17, 2008
is there an elegant way to use one equals sign in a where clause that returns true when both arguments are null, and returns true when neither is null but both are equal and returns false when only one is null?
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May 15, 2008
I have two SSIS packages that import from the same flat file into the same SQL 2005 table. I have one flat file connection (to a comma delimited file) and one OLE DB connection (to a SQL 2005 Database). Both packages use these same two Connection Managers. The SQL table allows NULL values for all fields. The flat file has "empty values" (i.e., ,"", ) for certain columns.
The first package uses the Data Flow Task with the "Keep nulls" property of the OLE DB Destination Editor unchecked. The columns in the source and destination are identically named thus the mapping is automatically assigned and is mapped based on ordinal position (which is equivalent to the mapping using Bulk Insert). When this task is executed no null values are inserted into the SQL table for the "empty values" from the flat file. Empty string values are inserted instead of NULL.
The second package uses the Bulk Insert Task with the "KeepNulls" property for the task (shown in the Properties pane when the task in selected in the Control Flow window) set to "False". When the task is executed NULL values are inserted into the SQL table for the "empty values" from the flat file.
So using the Data Flow Task " " (i.e., blank) is inserted. Using the Bulk Insert Task NULL is inserted (i.e., nothing is inserted, the field is skipped, the value for the record is omitted).
I want to have the exact same behavior on my data in the Bulk Insert Task as I do with the Data Flow Task.
Using the Bulk Insert Task, what must I do to have the Empty String values inserted into the SQL table where there is an "empty value" in the flat file? Why & how does this occur automatically in the Data Flow Task?
From a SQL Profile Trace comparison of the two methods I do not see where the syntax of the insert command nor the statements for the preceeding captured steps has dictated this change in the behavior of the inserted "" value for the recordset. Please help me understand what is going on here and how to accomplish this using the Bulk Insert Task.
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Dec 13, 2007
Hello:
I am running into an issue with RS2k PDF export.
Case: Exporting Report to PDF/Printing/TIFF
Report: Contains 1 table with 19 Columns. 1 column is static, the other 18 are visible at the users descretion. Report when printed/exported to pdf spans 2 pages naturally, 16 on the first page, 3 on the second, and the column widths have been adjusted to provide a perfect page span .
User A elects to hide two of the columns, and show the rest. The report complies and the viewable version is perfect, the excel export is perfect.. the PDF export on the first page causes every fith column, starting with the last column that was hidden to be expanded to take up additional width. On the spanned page, it renders the first column on that page correctly, then there is a white space gap equal to the width of the hidden columns and then the rest of the cells show with the last column expanded to take up the same width that the original 2 columns were going to take up, plus its width.
We have tried several different settings to see if it helps this issue or makes it worse. So far cangrow/canshrink/keep together have made no impact. It is not possible to increase the page size due to limited page size selection availablility for the client. There are far too many combinations of what the user can elect to show or hide to put together different tables to show and hide on the same report to remove this effect.
Any help or suggestion on this issue would be appreciated
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Sep 16, 2004
Do NULLs take up space on the Database? I mean is room allocated for them?
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Apr 5, 2004
Can someone tell me what to do if several NULLS are showing up within tables. Is there an easy step to locate all NULLS and delete them within the table?
Can someone provide detailed infromation on how to delete NULLS within tables. I'm new o the SQL side so I hope I have explained what it is that I'm looking to do. Our in house programmer said that the NULLS maybe causing a problem with the software communicating with the SQL Server software.
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Apr 12, 2008
I have a page with 100 numeric fields. SQL insert crashes lest there is a number in every field. Any way around this?
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Feb 9, 2007
Hi
i have a table t1 and wish to have to fk's now i want to be able to set it up so that only one of them can be null example:
t1
id___________fk1________fk2
1____________6__________NULL
2____________NULL_______3
3____________7__________NULL
4____________NULL_______NULL <<<<<<< This should not be allowed
thanks
james
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May 21, 2007
Hi i am new to SQL, and i have a data base thats got NULLS in it
is there a query i can run, which can take the NULL value out ?
anything will be greatly appreciated.
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Feb 6, 2007
Hi,I don't have any specific details as I do not really understand whythis is happening but we have a customer database that we have beenusing and queries on text fields have begun returning empty stringvalues instead of NULL.So for example:SELECT TAB1.DESCRIPTIONFROM TABLE1 TAB1WHERE TAB1.DESCRIPTION IS NOT NULLORDER BY 1may have returned 50 records in the past (purely an example). It isnow returning an additional record first that appears just to be ''.Now I am not too sure where to begin looking into this. ODBCconnections, collation settings? I just am not sure where to begin.The column will not have had '' inserted into it; therefore it shouldbe NULL.I have posted this mainly so I can see if anybody else has seen thissort of behaviour - I cannot see why this has suddenly happened.The collation setting on our server is different to that of thecustomer DB, but this shouldn't make a difference should it?If anybody has any ideas then I can post some more information.Thanks,Paul
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Mar 20, 2007
create table t1(c1 int, c2 varchar(10))insert t1 values(1,'Hello')insert t1 values(2,'')insert t1 values(3,NULL)select *from t1c1c21Hello23NULLselect *from t1where c2 = ' 'c1c22select *from t1where ltrim(rtrim(c2)) is nullc1c23NULLThe last query should have result as following. However sql server2000 does no list row c1 = 2.c1c223NULL
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Jul 20, 2005
HiI am probably going to regret asking this because I'm sure you are going totell me my design is bad 8-) ah well we all have to learn....anywayI often use Nulls as a marker to see if certain tasks have been completed.A typical example would be a column say invoice_valuewhen new work is entered and a new record is appended, I leave theinvoice_value column as NULL, so if I want a View for uninvoiced work Icheck for the invoice_value being equal to NULL, and alternatively if I wantinvoiced work, I check for not null. I did it this way to save putting inanother column that needed to be set to TRUE or FALSE. (I do similar thingselsewhere aswell)so far everything seems to work OK but reading some old stuff on Google Iget the feeling that NULLS should be left alone, have I done wrong?many thanksAndy
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Nov 26, 2007
Hello all
I have a colunm - Datatype : nvarchar - Contains: Numeric, characters, strings, date and NULLS
I am getting a the value of each row of this colunm in a variable say @var1
Now I am trying to do some functionalities depending on this variable.
The requirement is if this variable is not null I need to do some stuff.
So I write simple query:
IF (@var1 IS NOT NULL)
BEGIN
......
END
when i am doing this I get an Error:
Error converting data type nvarchar to numeric.
realizing this I change the condition to
IF ( LEN (@Var1) > 1)
then
IF (LEN (@Var1) <> 0)
but no use. I get the same error.
I even use cast
I get the error
Conversion failed when converting the nvarchar value 'null' to data type int.
IF(CAST (@OldValue AS INT)IS NOT NULL)
OR
IF(LEN (CAST (@OldValue AS INT)) <> 0)
Can somebody help in guiding the best practice to do this?
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Nov 4, 2007
Hi,This should be straight forward, but I've searched high and low on the net.I have a FORM which allows me to INSERT data, SQL Server 2005 backend. I populate the all the mandatory fields. But when I click on the Insert button, it won't let me save and says:Column 'PERSONAL_ID' does not allow nullsI'm
using tableadapters, business logic layers etc. and pausing clearly
shows that the values from the form are being passed to the procedure
that I have created "AddNewRecord". And PERSONAL_ID is definitely not
NULL! It fails on Line 971: Me.Rows.Add(row)PERSONAL_ID
is a primary key which I generate. The pause also shows that for
PERSONAL_ID it says " {"Conversion from type 'DBNull' to type 'String'
is not valid."}Function AddNewRecord looks like this:<System.ComponentModel.DataObjectMethodAttribute(System.ComponentModel.DataObjectMethodType.Insert, True)> _
Public Function AddNewRecord(ByVal PERSONAL_ID As String, ByVal SURNAME
As String, ByVal CHRISTIAN_NAME As String, ByVal SEX As String, _
ByVal FAMILY_POSITION As String, ByVal FAMILY_ID As String, ByVal
ADDRESS_1 As String, ByVal ADDRESS_2 As String, _ ByVal ADDRESS_3
As String, ByVal ADDRESS_4 As String, ByVal ADDRESS_5 As String, ByVal
ADDRESS_6 As String, ByVal POSTCODE As String, ByVal COUNTRY As String,
ByVal ORG_ID As String) As Boolean ' create a new details row instance Dim details As New smDetails.smTbl_DetailsIDDataTable Dim detail As smDetails.smTbl_DetailsIDRow = details.NewsmTbl_DetailsIDRow details.AddsmTbl_DetailsIDRow(detail)...my formview code is this: <InsertItemTemplate> PERSONAL_ID: <asp:TextBox ID="PERSONAL_IDTextBox" runat="server" Text='<%# Bind("PERSONAL_ID") %>' AutoPostBack="True" /> <br /> SURNAME: <asp:TextBox ID="SURNAMETextBox" runat="server" Text='<%# Bind("SURNAME") %>' AutoPostBack="True" /> <br /> CHRISTIAN_NAME: <asp:TextBox ID="CHRISTIAN_NAMETextBox" runat="server" Text='<%# Bind("CHRISTIAN_NAME") %>' /> <br /> SEX: <asp:TextBox ID="SEXTextBox" runat="server" Text='<%# Bind("SEX") %>' /> <br /> FAMILY_POSITION: <asp:TextBox ID="FAMILY_POSITIONTextBox" runat="server" Text='<%# Bind("FAMILY_POSITION") %>' /> <br /> FAMILY_ID: <asp:TextBox ID="FAMILY_IDTextBox" runat="server" Text='<%# Bind("FAMILY_ID") %>' /> <br /> ADDRESS_1: <asp:TextBox ID="ADDRESS_1TextBox" runat="server" Text='<%# Bind("ADDRESS_1") %>' /> <br /> ADDRESS_2: <asp:TextBox ID="ADDRESS_2TextBox" runat="server" Text='<%# Bind("ADDRESS_2") %>' /> <br /> ADDRESS_3: <asp:TextBox ID="ADDRESS_3TextBox" runat="server" Text='<%# Bind("ADDRESS_3") %>' /> <br /> ADDRESS_4: <asp:TextBox ID="ADDRESS_4TextBox" runat="server" Text='<%# Bind("ADDRESS_4") %>' /> <br /> ADDRESS_5: <asp:TextBox ID="ADDRESS_5TextBox" runat="server" Text='<%# Bind("ADDRESS_5") %>' /> <br /> ADDRESS_6: <asp:TextBox ID="ADDRESS_6TextBox" runat="server" Text='<%# Bind("ADDRESS_6") %>' /> <br /> POSTCODE: <asp:TextBox ID="POSTCODETextBox" runat="server" Text='<%# Bind("POSTCODE") %>' /> <br /> COUNTRY: <asp:TextBox ID="COUNTRYTextBox" runat="server" Text='<%# Bind("COUNTRY") %>' /> <br /> ORG_ID: <asp:TextBox ID="ORG_IDTextBox" runat="server" Text='<%# Bind("ORG_ID") %>' /> <br /> <asp:LinkButton ID="InsertButton" runat="server" CausesValidation="True" CommandName="Insert" Text="Insert" /> <asp:LinkButton ID="InsertCancelButton" runat="server" CausesValidation="False" CommandName="Cancel" Text="Cancel" /> </InsertItemTemplate> Any pointers in the right direction would be appreciated. Thanks in advanceTushar
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Mar 11, 2008
I have the following query:
SELECT tblArticleCategory.ACategoryID, IsNull(ParentCategory, '') + IsNull( ' > ' + ACategoryName, '') AS Category from tblArticlecategory
RIGHT OUTER JOIN (SELECT ACategoryName as ParentCategory, ACategoryID from tblArticleCategory WHERE AParentID is null AND aActive=1) AS Parent
on parent.ACategoryID = tblArticleCategory.AParentID
WHERE tblArticleCategory.AActive=1ORDER BY Category
This produces an ordered list of the parent categories and subcategories from the table as long as there is a subcateogry directly below one of the parent categories. If there isn't one directly below the parent category, the parent category is dropped from the list. None of the parents with the NULLS back to back are in the list.
6 Arts & Entertainment > Dance2 Arts & Entertainment > Movies13 Computers > E-Learning4 Computers > Hardware14 Computers > Java16 Computers > Link Popularity17 Computers > Microsoft.net15 Computers > RSS5 Computers > Software8 Real Estate > Finance
How do I fix the query so that Automotive, Business, Cancer and Communications are included in the list?
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Apr 9, 2003
I have a table as part of a replicated database where i need to change the allow nulls value (set it to not allow nulls) but when i try to save the table i get this error.
'CONTACTS' table
- Unable to modify table.
ODBC error: [Microsoft][ODBC SQL Server Driver][SQL Server]Cannot drop the table 'dbo.CONTACTS' because it is being used for replication.
will i have to stop replication to make the change or is it worse and i have to delete the publication and start all over again?
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Jul 13, 2004
Hi All,
I have a table with 3 columns. Product, Location and Value. The data looks like this:
NULL NULL 100
Atlanta NULL 50
Atlanta Cookie1 30
Atlanta Cookie2 20
Dallas NULL 120
Dallas Cookie1 80
Dallas Cookie2 40
This table gets filled with a Groupby with Rollup option. The NULLS show subtotals/total. Is there a way to build a query that returns the results with NULLs at the bottom of each section like:
Atlanta Cookie1 30
Atlanta Cookie2 20
Atlanta NULL 50
Dallas Cookie1 80
Dallas Cookie2 40
Dallas NULL 120
NULL NULL 100
Thanks,
Shab
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Dec 21, 2005
Hi,
I've forgotten how to put a null value in a column of a table where a previous value existed before.
What I mean is if through EM, you look at the data (Open Table -> Return all Rows) and you see a value in a column that is nullable (for example, I want to change a column that has a 'ABC Company' to a NULL value).
How do you that - i've done it in the past ,but cannot remember
Thanks in advance
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Mar 10, 1999
We have compare two table with populated with the same data and with the same definition except, one table allows nulls
and the other table does not. All the fields are defined as integer. The table that allows nulls takes much more data space.
Why is that? I could not find an explaination in BOL.
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Mar 15, 2002
I have the following query in a stored procedure. If there are no rows in the history file, it returns a null. If there some setting or function that would have it return a zero if no rows are found? I use the variable to do arithmetic later on and a null messes everything up.
select@MarketTotal = sum(isnull(MarketValue,0))
fromhistory
whereEmpUID = @EmpUID and
Shares > 0
Thanks,
Ken Nicholson
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Mar 27, 2002
I'm using ADO.NET and have noticed that it is somewhat more difficult to send/receive nulls to/from the database. What are the benefits (if any exist) with storing a null value in the db as opposed to a default value?
In particular, do you save any space by storing a null opposed to a zero or 01/01/1900? Are the nulls faster for searching/comparing when querying the db?
Basically I'm just wondering if storing nulls is really the best practice and why, so that I know whether it's worth the effort in .NET to transform my variables into a null-happy form.
Any facts/opinions are appreciated,
Inge
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Oct 18, 2001
Documentation states that you can set the Default Value for a column which is to be used whenever a row with a null value is inserted into the table. However, it appears that the column ends up as NULL regardless of this setting when inserted field has a value of NULL.
We have a stored procedure that accepts parameters for each column on the table and initializes the incoming parameter to NULL. It then inserts the row into the table. Table definition allows NULLs in the columns, but has a Default Value of ''.
Are we missing a setting somewhere?
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