Checkbox Data-bound To A Bit SQL Field Can't Handle NULL Values
Jun 18, 2004
I have a checkbox on my webform that is bound to a bit field in my SQL table. I'm fine as long as I've got the bit field set to 0 or 1, but if the field is NULL, the checkbox throws an exception during the databind.
Is there any way to handle this without removing the data binding and manually setting the value (ie: some way to intercept it before the exception gets thrown and then setting the field value in the dataset)?
Thanks!
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Apr 3, 2008
Hey all,
1) I have a report with many parameters that I want users to be able to pick from. Allow them to pick 1, many or all to build their report dynamically. I'm all set on the TSQL side, but on the Reporting Services side I have to allow each parameter to be null with a default of NULL. In by doing this, the report will auto run, which I do not want to happen. The only resolution I've found thus far was by adding a parameter that does nothing, with a NULL default value. Yet It sticks out like a sore thumb on the report and I want to get rid of it. If I check in "Hidden" in the parameter options, my report errors out stating that the parameter requires a value.
2) Is it possible to have a parameter that has available values from a dataset have a NULL checkbox like those of parameters that do not have available values?
3) Is it possible to add back/forward buttons inside of a report instead of just at the report header by default?
Thanks!
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May 15, 2007
Hi all I am trying to populate a page with data from a SQL DB however one field is null. The problem is this is causing a StrongTypingException and I am not sure how I should handle this to stop the apllication crashing. I am trying to assign a bit value from a SQL Db to checkboxI have tried putting if (Convert.IsDBNull(contentRow.pag_status) == false){//Do what I want}
but this still throws the exception
Can anyone help!?
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Feb 19, 2008
Hi,
In my Excel file, The Application date column contains empty for some rows. In SSIS I am using one Data Conversion to that Application Date column to change it as Date[dt_Date]. This data conversion is giving error Conversion failed. In Sqlserver table, I declare ApplicationDate column datatype as DateTime.
I want to keep those empty date values as Null in Sqlserver.
I tried the IMEX=1 property still it is not working. How to solve this error?
Thanks in advance.
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Aug 17, 2005
If myDateTimeColumn contains a <NULL> value. How do you handle that when reading into a DateTime object in your code?DateTime myDate = Convert.ToDateTime(dr["myDateTimeColumn"]);Does not work, it throws: System.InvalidCastException: Object cannot be cast from DBNull to other types.
I am curious as to what others are doing to handle this?
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Mar 1, 2007
I am importing an Access .mdb file into MS SQL server, and empty fields where the default value is "", change into NULL. This is a problem when I re-export a result set and have to apply a procedure to clean these values. Is there a way to eliminate this? . . . . and what have I missed?
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Apr 22, 2008
Hi All,
I want to show 0, if the field contains NULL values.
I use the following expression.
=IIf(Fields!MTD_TotGrossBKCOAmt.Value = "NULL" , SUM(Fields!MTD_TotGrossBKCOAmt.Value), 0 )
But this works if the field contains only NULL values.
If it has a value, then it shows as #Error
Can anyone tell me how to make this work?
Thanks
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May 9, 2005
I have a function that updates a table in sql server
If a field is left blank I want the database field set to Null. I use:sqlCmd.Parameter.Add("@somefield, someintvalue) to pass all my values to the database.
if someintvalue is null I want to set @somefield to dbnull
How can I do this? I get errors if I submit a null integer when there is a foreign key constraint. What is the best way to handle this? should I just make all parameters objects? so that I can set them to DBNull.Value?
Also on a side note, when you are populating fields from a datatable, is there a better way to set the values (i.e. of a textbox) than cheking for DBNull before assigning?
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Aug 29, 2006
I cannot in the life of me understand what goes wrong here... In a webapplication (C#.NET) I traced an inability to retrieve existing records to SQL Server, where I cannot do the same either. The problem is that in the parameterized query, some fields can be null, and thus when the corresponding fields in the database record are null also, they should be selected. But this won't happen for some reason.
I wrote a test SQL statement that gives me the same bogus:
DECLARE @institution int, @collection int, @serialnr int, @subnr nvarchar(50)SET @institution = 1 SET @collection = 1SET @serialnr = 240 SET @subnr = NULLSELECT ID, Institution, Collection, SerialNumber, SubNumber, AccessionYear, Sagsnummer, DanekraeNr, TaxonIdentified, Stratigraphy, TypeStatus, PlacementRoom, PlacementCabinet, PlacementDrawer, UnitNotesFROM SpecimensWHERE (Institution = @institution) AND (Collection = @collection) AND (SerialNumber = @serialnr) AND (SubNumber = @subnr)
Now there is at least one row with corresponding fields values (1, 1, 240, null), but it won't be selected! What is wrong!?
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Feb 13, 2007
Hi
I have a really simple query which i can't figure out why its not working. I have a table called 'ADMIN' which has a datetime field called 'date_edited'. Because the majority of records have never been edited, i have allowed null values and they are filled with 'NULL' in each record. How ever, when i try:
SELECT * FROM ADMIN WHERE date_edited = NULL
I get no records, but i can see and know i have hundreds! I know i'm doing somthing really stupid, but for life of me can't figure it out! :eek:
thanks
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Feb 8, 2007
Hi all,
I'm using the NULL checkbox in a report. Is it possible to change the diplayed name 'NULL' in a different name. The user will not see 'NULL' but something else.
Is that possible??
Greetz
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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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Jun 16, 2012
Ok I have upgraded my works database from a poorly designed Access database to a SQL database. The previous system allowed NULL values and duplicates to be inserted into a field that should NOT ALLOW NULL Values or duplicates. Therefore, this issue has now been moved across to my new system as I cannot set these constraints on the field that has multiple NULL values.
My solution would be to use a sequential operator, so whatever = NULL would be changed to a sequential number that us as administrators would know was a bogus number starting at something like = 999999900 counting up from that. There are only 250 records that would require updating.
To make things more interesting this field is not a integer type, its a Nvarchar type as its a Hardware ID. Both numerical and characters are require.
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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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Jan 30, 2008
Hi All,
I have a database table with a bit field. In my .aspx page I have a checkbox that is checked by default. My SqlDataSource is set up like so:
InsertCommand="INSERT INTO Studies (Study_Name, Study_Status) VALUES (@StudyName, @StudyStatus)"> <InsertParameters> <asp:ControlParameter ControlID="txtStudyName" Name="StudyName" PropertyName="Text" Type="String"/> <asp:ControlParameter ControlID="chkboxStudyStatus" Name="StudyStatus" PropertyName="Text" Type="Boolean"/>
I'm getting an error when inserting.
Error: Cannot insert the value NULL into column 'Study_Status', table 'Studies'; column does not allow nulls. INSERT fails. The statement has been terminated.
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Jul 24, 2006
hi I have a bit field in sql server represented by a checkbox ... I am updating the database in code ( ie not using formview generated update .. ) the line that is falling over is .Parameters.Add("@archive", SqlDbType.Bit).Value = txtarchive.Checkedit falls over saying failed to convert string parameter to boolean the
value of txtarchive.checked is either true or false - how do i convert
this to 1 or 0 or something that sql is happy with ... thanks
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Mar 19, 2008
Hi i am trying to store the checkbox values on my page to the database, but im stuck on what to do. I have the following code already;protected void Btn_Subscribe_Click(object sender, EventArgs e)
{SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["streamConnectionString"].ConnectionString);
string strSQL = "INSERT INTO Newsletter(emailAddress) VALUES (@emailAddress)";SqlCommand Command = new SqlCommand(strSQL, conn);
Command.Parameters.Add("@emailAddress", SqlDbType.VarChar);Command.Parameters["@emailAddress"].Value = txtEmail.Text;
conn.Open();
Command.ExecuteNonQuery();
conn.Close();
}
How do i now insert the values from my checkbox, this is how i am setting the checkbox;public void Page_Load(object sender, EventArgs e)
{ArrayList values;if(!IsPostBack)
{
//Build array of data to bind to checkboxlistvalues = new ArrayList();
values.Add("Sport");values.Add("Gardening");values.Add("technology");
AlertList.DataSource = values;
AlertList.DataBind();
}
If i am going about it the wrong way please let me know, thanks
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Dec 17, 2004
Edited by SomeNewKid. Please post code between <code> and </code> tags.
This is probaly the easiest question you've ever read but here goes.
I have a simple checkbox value that i want to insert into the database but whatever i do it does not seem to let me.
Here is my code:
Sub AddSection_Click(Sender As Object, e As EventArgs)
Dim myCommand As SqlCommand
Dim insertCmd As String
' Build a SQL INSERT statement string for all the input-form
' field values.
insertCmd = "insert into Customers values (@SectionName, @SectionLink, @Title, @NewWindow, @LatestNews, @Partners, @Support);"
' Initialize the SqlCommand with the new SQL string.
myCommand = New SqlCommand(insertCmd, myConnection)
' Create new parameters for the SqlCommand object and
' initialize them to the input-form field values.
myCommand.Parameters.Add(New SqlParameter("@SectionName", SqlDbType.nVarChar, 50))
myCommand.Parameters("@SectionName").Value = Section_name.Value
myCommand.Parameters.Add(New SqlParameter("@SectionLink", SqlDbType.nVarChar, 80))
myCommand.Parameters("@SectionLink").Value = Section_link.Value
myCommand.Parameters.Add(New SqlParameter("@Title", SqlDbType.nVarChar, 50))
myCommand.Parameters("@Title").Value = Section_title.Value
If New_window.Checked = false Then
myCommand.Parameters.Add(New SqlParameter("@NewWindow", SqlDbType.bit, 1))
myCommand.Parameters("@NewWindow").Value = 0
else
myCommand.Parameters.Add(New SqlParameter("@NewWindow", SqlDbType.bit, 1))
myCommand.Parameters("@NewWindow").Value = 1
End If
If Latest_news.Checked = false Then
myCommand.Parameters.Add(New SqlParameter("@LatestNews", SqlDbType.bit, 1))
myCommand.Parameters("@LatestNews").Value = 0
else
myCommand.Parameters.Add(New SqlParameter("@LatestNews", SqlDbType.bit, 1))
myCommand.Parameters("@LatestNews").Value = 1
End If
If Partners.Checked = false Then
myCommand.Parameters.Add(New SqlParameter("@Partners", SqlDbType.bit, 1))
myCommand.Parameters("@Partners").Value = 0
else
myCommand.Parameters.Add(New SqlParameter("@Partners", SqlDbType.bit, 1))
myCommand.Parameters("@Partners").Value = 1
End If
If Support.Checked = false Then
myCommand.Parameters.Add(New SqlParameter("@Support", SqlDbType.bit, 1))
myCommand.Parameters("@Support").Value = 0
else
myCommand.Parameters.Add(New SqlParameter("@Support", SqlDbType.bit, 1))
myCommand.Parameters("@Support").Value = 1
End If
myCommand.Connection.Open()
' Test whether the new row can be added and display the
' appropriate message box to the user.
Try
myCommand.ExecuteNonQuery()
Message.InnerHtml = "Record Added<br>" & insertCmd
Catch ex As SqlException
If ex.Number = 2627 Then
Message.InnerHtml = "ERROR: A record already exists with " _
& "the same primary key"
Else
Message.InnerHtml = "ERROR: Could not add record, please " _
& "ensure the fields are correctly filled out"
Message.Style("color") = "red"
End If
End Try
myCommand.Connection.Close()
BindGrid()
End Sub
Any response would be appreciated
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Oct 30, 2007
Hello,
I have a report where I'm showing a list of users to select.
When previewing the report, the width of the field is automatically set to the largest label in the dropdown list.
But when I change the parameter to have "Multi-Values", then the width is set to a fixed value and a horizontal scrollbar appears.
Does anyone know how to have a "Multi-Values" parameter, but keeping the lasgest width of the labels in the dropdown list ?
Thanks in advance
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Sep 12, 2005
I have been trying to add values to a database and it keeps failing
i have no idea what i am doing wrong please help the code is asp.net
using vb. I have been having serious trouble passing check boxes in
forms from day one both singularly and dynamically from datagrids
if someone could show me some sample code of how to pass these
sort of values into the component and on to the query in this way
i would very much appreciate it.
Fuzzygoth
the error returned is
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:
INSERT statement conflicted with COLUMN FOREIGN KEY constraint
'tblStation_FK00'. The conflict occurred in database 'TealSQL', table
'tblTravelPoint', column 'travelpointID'.
The statement has been terminated.
I have marked the area of the code the error is returned in the colour Violet and with a ##
The code i am using is below
## The aspx page ##
<%@ Page Language="vb" Debug="true" Trace="True"
Inherits="Devotion2Motion.AdminComp"
Src="../CodeBehind/AdminModule.vb" %>
<!-- Binds the ActivityResortInfo.ascx user control to the page -->
<%@ Register TagPrefix="UserContol" TagName="D2MHeader" Src="../UserControls/Header.ascx" %>
<%@ Register TagPrefix="UserContol" TagName="D2MFooter" Src="../UserControls/Footer.ascx" %>
<%@ Register TagPrefix="UserContol" TagName="TravelPointDD" Src="../UserControls/TravelPointDD.ascx" %>
<script language="vb" runat="server">
Sub Page_Load()
If IsPostback = True Then
Dim aInternational As Integer
Dim Station As String = Request.Form("StationFrm")
Dim Type As String = Request.Form("TypeFrm")
Dim Address1 As String = Request.Form("address1Frm")
Dim Address2 As String = Request.Form("address2Frm")
Dim City As String = Request.Form("cityFrm")
Dim International As String = Request.Form("InternationalFrm")
Dim TravelPoint As Integer = Request.Form("_ctl5:dsTravelPointDD")
If IsNothing(International) Then
aInternational = "0"
Else
aInternational = "1"
End If
Dim AdminTravelPoints As New Devotion2Motion.AdminComp()
' Select the country dropdown list
AdminTravelPoints.AddStation(Station, Type, Address1, Address2, City,
aInternational, TravelPoint)
End If
Dim ReadResultTable As New Devotion2Motion.AdminComp()
' Select the country dropdown list
dsResultSet.DataSource = ReadResultTable.GetStationtbl()
dsResultSet.DataBind()
End Sub
</script>
<!-- This UserControl Pulls in the header UserControl and the Div Tag Positions it #css reffrence is TopControl -->
<Div Class="TopControl">
<UserContol:D2MHeader runat="server"/>
</Div>
<form method="post" action="AdminTravelPoint.aspx" runat="server">
<Div Class="CentreControl">
<table border="0">
<tr>
<td>
<asp:Label Text="Station Name: " CssClass="BodyStyle" runat="server"/>
</td>
<td>
<asp:TextBox ID="StationFrm" CssClass="PrimaryGrid" runat="server"/>
</td>
<tr>
<tr>
<td>
<asp:Label Text="Type: " CssClass="BodyStyle" runat="server"/>
</td>
<td>
<asp:TextBox ID="TypeFrm" CssClass="PrimaryGrid" runat="server"/>
</td>
<tr>
<tr>
<td>
<asp:Label Text="Address1: " CssClass="BodyStyle" runat="server"/>
</td>
<td>
<asp:TextBox ID="Address1Frm" CssClass="PrimaryGrid" runat="server"/>
</td>
<tr>
<tr>
<td>
<asp:Label Text="Address2: " CssClass="BodyStyle" runat="server"/>
</td>
<td>
<asp:TextBox ID="Address2Frm" CssClass="PrimaryGrid" runat="server"/>
</td>
<tr>
<tr>
<td>
<asp:Label Text="City: " CssClass="BodyStyle" runat="server"/>
</td>
<td>
<asp:TextBox ID="CityFrm" CssClass="PrimaryGrid" runat="server"/>
</td>
<tr>
<tr>
<td>
<asp:Label Text="International: " CssClass="BodyStyle" runat="server"/>
</td>
<td>
<asp:CheckBox ID="InternationalFrm" CssClass="PrimaryGrid" runat="server"/>
</td>
<tr>
</tr>
<td>
<asp:Label Text="Travel Point: " CssClass="BodyStyle" runat="server"/>
</td>
<td>
<UserContol:TravelPointDD runat="server"/>
</td>
<tr>
</tr>
<td>
</td>
<td>
<input value="Submit" type="submit">
</td>
</tr>
</table>
</Div>
<asp:DataGrid ID="dsResultSet" AutoGenerateColumns="False" CssClass="PrimaryGrid" ShowHeader="true" runat="server">
<Columns>
<asp:BoundColumn DataField="StationID" ReadOnly="true" HeaderText="Station ID"/>
<asp:BoundColumn DataField="Station" ReadOnly="true" HeaderText="Station"/>
<asp:BoundColumn DataField="Type" ReadOnly="true" HeaderText="Type"/>
<asp:BoundColumn DataField="Address1" ReadOnly="true" HeaderText="Address"/>
<asp:BoundColumn DataField="Address2" ReadOnly="true" HeaderText=" "/>
<asp:BoundColumn DataField="City" ReadOnly="true" HeaderText="City"/>
<asp:BoundColumn DataField="International" ReadOnly="true" HeaderText="International"/>
<asp:BoundColumn DataField="TravelPoint" ReadOnly="true" HeaderText="City"/>
</Columns>
</asp:DataGrid>
</form>
<Div Class="CenterControl">
<UserContol:D2MFooter runat="server"/>
</Div>
##the vb componet that passess to the sql query ##
Public Function AddStation(ByVal Station As String, ByVal Type As
String, ByVal Address1 As String, ByVal Address2 As String, ByVal City
As String, ByVal aInternational As Integer, ByVal TravelPoint As
Integer) As SqlDataReader
' Create Instance of Connection and Command Object
Dim
myConnection As New
SqlConnection(ConfigurationSettings.AppSettings("strConn"))
Dim
myCommand As New SqlCommand("sp_call_Station_Insert", myConnection)
' Mark the Command as a SPROC
myCommand.CommandType = CommandType.StoredProcedure
' Add Parameters to SPROC
Dim
parameterStation As New SqlParameter("@Station", SqlDbType.NVarChar, 50)
parameterStation.Value = Station
myCommand.Parameters.Add(parameterStation)
' Add Parameters to SPROC
Dim
parameterType As New SqlParameter("@Type", SqlDbType.NVarChar, 50)
parameterType.Value = Type
myCommand.Parameters.Add(parameterType)
' Add Parameters to SPROC
Dim
parameterAddress1 As New SqlParameter("@Address1", SqlDbType.NVarChar,
50)
parameterAddress1.Value = Address1
myCommand.Parameters.Add(parameterAddress1)
' Add Parameters to SPROC
Dim
parameterAddress2 As New SqlParameter("@Address2", SqlDbType.NVarChar,
50)
parameterAddress2.Value = Address2
myCommand.Parameters.Add(parameterAddress2)
' Add Parameters to SPROC
Dim
parameterCity As New SqlParameter("@City", SqlDbType.NVarChar, 50)
parameterCity.Value = City
myCommand.Parameters.Add(parameterCity)
' Add Parameters to SPROC
Dim
parameteraInternational As New SqlParameter("@aInternational",
SqlDbType.Int, 4)
parameteraInternational.Value = aInternational
myCommand.Parameters.Add(parameteraInternational)
' Add Parameters to SPROC
Dim
parameterTravelPoint As New SqlParameter("@TravelPoint", SqlDbType.Int,
4)
parameterTravelPoint.Value = TravelPoint
myCommand.Parameters.Add(parameterTravelPoint)
' Execute the command
myConnection.Open()
## Dim result As SqlDataReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection)
' Return the datareader
Return result
End Function
## The sql stored procedure ##
CREATE PROCEDURE [dbo].[sp_call_Station_Insert]
(
@Station As nVarChar(50),
@Type As nVarChar(50),
@address1 As nVarChar(50),
@address2 As nVarChar(50),
@City As nVarChar(50),
@aInternational As nVarChar(50),
@TravelPoint As Int
)
AS
DECLARE @ConVale As nVarChar(50)
SET @ConVale = (SELECT Station FROM tblStation WHERE @Station = Station)
If @ConVale = @Station
BEGIN
SELECT * FROM tblStation
END
ELSE
BEGIN
insert into tblStation
(Station, Type, address1, address2, city, International, TravelPoint)
values (@Station, @Type, @address1, @address2, @City, @aInternational, @TravelPoint)
SELECT * FROM tblStation
END
GO
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Aug 17, 2007
Hi, Im trying to run this query
UPDATE DataModif
SET t.Ind_des = Replace (t.Tit_Des,"'",'"')
FROM Tit_Modificables t
WHERE
t.Ind_num in
(SELECT CAST (t2.Ind_num AS VARCHAR(10))
FROM Tit_Modificables t2
WHERE t2.Emp_id ='1100004' AND t2.Ejercicio_fiscal = 2003 AND t2.Nom_tabla = CAST (10 AS NUMERIC))
but ir sends this message error
The multi-part identifier "t.Ind_num" could not be bound.
I don't know if there is a problem because I'm using an Update.. FROM
Any help?
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Apr 28, 2006
Hi,
When I try execute one query in SQL 2k5, with alias in order by clausule, I retrieve the follow message:
Server: Msg 4104, Level 16, State 1, Line 1
The multi-part identifier "alias.fields" could not be bound.
Where alias is a any alias and, fields is a field of the table with alias.
Already exists one fix to patch this?
Thanks
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Jul 23, 2005
I already asked this question; however, I am giving all the detailsnow:We get large files(millions of records) and we need to load it into ourtables using import export wizard. Some of the fields in the file canbe Null and so we are forced to create table with fields that allowNulls with default ''. However when we insert data into these tablesit puts Null in those fields even though we have a default '' (I do notthink we have any work around for that; do we?)Finally we need to go through each field and update it to '' if it is aNull and that takes LOT OF TIME.If (select count (*) from <tablename> where <columname> is Null) >0BeginUpdate <tablename>set <columnName> = ''where <columnName> is NullendPlease let me know if there are any work arounds for this crisis ?Thank you very much in advance!
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Oct 16, 2006
My way:
add column (boolean) to speicify whether is null or not in drived column component, i feel that's a little difficult
any better ideas? thanks
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May 8, 2007
Hi,
I want to search for alphanumeric values between an upper and lower bound in a sql database.For example: search for a serial number like pvf-456-3b. Upper bound is q, lower bound is g.I should then get every serial number starting with g - q.If possible the bounds should be more specific like "search for serial number between gt2 and qy"Can anybody help me out?
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Jan 17, 2007
Im trying to execute following update SQL:
UPDATE Property SET ImageList = U.ImageList
FROM Property M
INNER JOIN RETS.dbo._Updates U ON M.ListingID = U.ListingID AND M.FeedID
= U.FeedID
WHERE M.FeedID = ?
But following error:
[Execute SQL Task] Error: Executing the query " UPDATE Property SET
ImageList = U.ImageList FROM Property
M INNER JOIN RETS.dbo._Updates U ON M.ListingID = U.ListingID
AND M.FeedID = U.FeedID WHERE M.FeedID = ?" failed with
the following error: "The multi-part identifier "M.FeedID" could
not be bound.". Possible failure reasons: Problems with the query,
"ResultSet" property not set correctly, parameters not set correctly,
or connection not established correctly.
ByPassPrepare is set to TRUE and ParameterName = 0 to variable User::Feed_ID
HOWEVER - following query executes fine:
UPDATE Property SET
ImageList = U.ImageList
FROM Property M
INNER JOIN RETS.dbo._Updates U ON M.ListingID = U.ListingID AND M.FeedID
= U.FeedID
WHERE M.FeedID = 11
Beats me - any help with explaining this to me
please?
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Nov 11, 2006
Using asp.net 2.0 and visual studio 2005. The question is regarding the following ER diagram: I've made Firstname, lastname, buildingID and RoomNum all required fields. I've got a modified GridView that displays all of the table Faculty columns. It's been modified so the BuildingID and DepID are resolved to their actual field names and displayed in a DropDownList. In the dropdown list I used for inserting (a seperate DetailsView control), I manually inserted an item into the Department dropdownlist which had the text "-- Select a Department --" with a value of -1. MS SQL didn't like that -1 value so I wrote the following code to fix it: protected void dsFaculty_Inserting(object sender, SqlDataSourceCommandEventArgs e)
{
if (e.Command.Parameters["@DeptID"].Value.ToString() == "-1")
{
e.Command.Parameters["@DeptID"].Value = null;
}
} That means of course DeptID is null, which is ok. The problem arises is when I try to edit that row in the GridView. I get the an error 'ddlDepartment' has a SelectedValue which is invalid because it does not exist in the list of items.Parameter name: valueIdeally, I'd like to make the dropdown list in the GridView show "-- None --" for the DeptID if it comes across a null value. I already tried playing around with the Command.Parameters in the dsFaculty_Selected function, but it didn't work. Ideas?
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Nov 20, 2006
Hi Everyone
This is the query and I am getting follwoing error message
"The multi-part identifier "InvDate.Account Reference" could not be bound."
SELECT MAX([DATE NOTE ADDED]) AS LASTDATE,
CC.[COMPANY],
CC.[ACCOUNT REFERENCE],
INVDATE.[LASTORDERDATE]
FROM CUSTOMERCONTACTNOTES AS CCN,
(SELECT *
FROM CUSTOMER) AS CC,
(SELECT MAX([INVOICE DATE]) AS LASTORDERDATE,
[ACCOUNT REFERENCE]
FROM INVOICEDATA
GROUP BY [ACCOUNT REFERENCE]) AS INVDATE
WHERE CCN.[COMPANY] = CC.[COMPANY]
AND CC.[ACCOUNT REFERENCE] COLLATE SQL_LATIN1_GENERAL_CP1_CI_AS IN (SELECT DISTINCT ([ACCOUNT REFERENCE])
FROM INVOICEDATA)
AND CC.[ACCOUNT REFERENCE] COLLATE SQL_LATIN1_GENERAL_CP1_CI_AS = INVDATE.[ACCOUNT REFERENCE]
GROUP BY CC.[COMPANY],CC.[ACCOUNT REFERENCE]
ORDER BY CC.COMPANY ASC
By the way its SQL Server 2005 Environment.
Mitesh
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Mar 19, 2008
Re: SQL Server Reporting Services
I have welders who have active dates and inactive dates, and I need to create an "isactive" column in the report. My formula will be pretty obvious to most of you. However, if the user does not input an inactive date, that means none has been given and therefore the welder is currently active. The problem is that there seems to be no way to check if inactive date is null or not in the formula.
Please help! Thanks!
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Jul 16, 2006
I have a datatable : Data_Table and a look up table: Lk_table. Myfield that I
use in Inner Join is defined in both the
data and look table.
So I build my query like this:
SELECT * FROM dbo. Data_Table INNER JOIN
dbo. Lk_table ON dbo.Data_Table.MyField = dbo.Lk_table.Myfield
The pb, sometimes I
have myfield still with its default null value in the datatable: Data_Table.
So, I end up getting 0 record when I execute the query shown above.
How do I turn that around so that even if myfield in Data_Table
is Null, I still get the records from Data_Table. (I don t want a set of
records including all possible values from the look up table: Lk_Table)
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Jan 23, 2007
Hi, I've a question about importing Oracle data and some fields are null. I get an error 'Conversion failed because the data value overflowed the specified type'. When i look in preview query result, via OLE db Source editor > Preview, this field contains '<value too big to display>'.
What do i do wrong? Can somebody help me?
Thanks in advance
Olaf
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Oct 18, 2006
Hello,
I'm trying to import some data from a spreadsheet to a database table from a package in integration services. The problem is that I see the data when I open the excel file but when I try to run my package , it doesn't insert any rows in the table and it finishes with a success status.
My excel file has some formulas to get the data from other worksheets. I added a Data Viewer and all I see is null values in every cell.
I need help...does anyone know what's wrong?
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Jul 5, 2007
I have a web application. In some instances, I have a need to send guid parameter as null while making a sql query to SQL 2005. My question is as how to handle this null guid on .net and sql side.
Thanks! in advance.
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