DB Design- NULL Column!!
Oct 28, 2005
Hello FriendsSuppose I'm designing one database table- ABC master and it has fields like field1, field2........field5. From these fields, Field1 is PK and 2 & 3 and mandatory. So while creating this table, is it necessary to specify the field 2 & 3 as NotNull in Null column.If I specify them as Null then does it effect aby thing. As i know that before saving the data to the database the programming logic checks whether the mandatory data entered or not?Reply back..Thanks
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Apr 2, 2007
I am getting this error: "Cannot insert the value NULL into column 'OrderID', table 'outman.outman.Contact'; column does not allow nulls. INSERT fails." -- But my value is not null. I did a response.write on it and it show the value. Of course, it would be nice if I could do a breakpoint but that doesn't seem to be working. I'll attach a couple of images below of my code, the error, and the breakpoint error.
Server Error in '/' Application.
Cannot insert the value NULL into column 'OrderID', table 'outman.outman.Contact'; column does not allow nulls. INSERT fails.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.SqlClient.SqlException: Cannot insert the value NULL into column 'OrderID', table 'outman.outman.Contact'; column does not allow nulls. INSERT fails.Source Error:
Line 89: sContact.Phone = sPhone.Text.Trim
Line 90: sContact.Email = sEmail.Text.Trim
Line 91: sContact.Save()
Line 92:
Line 93: Dim bContact As Contact = New Contact()Source File: F:InetpubwwwrootOutman KnifeCheckout.aspx.vb Line: 91 Stack Trace:
[SqlException (0x80131904): Cannot insert the value NULL into column 'OrderID', table 'outman.outman.Contact'; column does not allow nulls. INSERT fails.]
System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +857354
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +734966
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +188
System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +1838
System.Data.SqlClient.SqlDataReader.HasMoreRows() +150
System.Data.SqlClient.SqlDataReader.ReadInternal(Boolean setTimeout) +214
System.Data.SqlClient.SqlDataReader.Read() +9
System.Data.SqlClient.SqlCommand.CompleteExecuteScalar(SqlDataReader ds, Boolean returnSqlValue) +39
System.Data.SqlClient.SqlCommand.ExecuteScalar() +148
SubSonic.SqlDataProvider.ExecuteScalar(QueryCommand qry) +209
SubSonic.DataService.ExecuteScalar(QueryCommand cmd) +37
SubSonic.ActiveRecord`1.Save(String userName) +120
SubSonic.ActiveRecord`1.Save() +31
Checkout.btnCheckout_Click(Object sender, EventArgs e) in F:InetpubwwwrootOutman KnifeCheckout.aspx.vb:91
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +105
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +107
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102
Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42
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May 13, 2015
It's giving me an error while I'm trying to change column value from not null to null..
'tblid' table
- Unable to modify table. Â
Cannot insert the value NULL into column 'ValidID', table 'Xe01.dbo.Tmp_tblid'; column does not allow nulls. INSERT fails.
The statement has been terminated.
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Sep 15, 2015
I am creating a view and want to select records where the value of a Customer field (Klant Test Plan) is NULL or has exact the same value as for example customer field 2 (Klant Schedule).
I have already the code below:
SELECT DISTINCT
                     TOP (100) PERCENT dbo.Product.ERPKey, dbo.TestPlan.CoA, dbo.TestMethod.WorkInstruction, dbo.Customer.Name AS [Klant Testplan],
                     Customer_1.Name AS [Klant Schedule], LEFT(dbo.ShopFloor.ShopFloorNumber, 7) AS Schedule,
                     CASE WHEN Customer_1.Name = 'ItsMe BV' THEN Customer.Name ELSE Customer_1.Name END AS Customer
FROMÂ Â Â Â Â Â Â Â dbo.Customer AS Customer_1 INNER JOIN
[Code] ....
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Oct 5, 2015
How Can I Create Two Column with Math Function In one Column  Like Below.Â
Create Table Tbl_V_Voucher_Details
(
Id Int IDentity (1,1) Primary Key,Â
Catid Int Foreign Key References Tbl_V_Voucher_Info(Id),
ItemId Int Foreign Key References Tbl_V_Item(Id),
Discription varchar
(100),
Qty Int,
Price Float,
Qty * Price As TotalÂ
)
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Apr 27, 2007
Dear folks,
please tell me the query for altering a column from not null to null
Vinod
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Feb 28, 2008
Hi all,
One of my columns is the table has some Null values, and I Would like to stop having NULL values into that column any more.
I know, If I alter the column to NOT NULL will throw me an error, since it does a batch update.
Is there any way to achieve this...
Thanks...
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Feb 29, 2008
Hi all,
One of my columns is the table has some Null values, and I Would like to stop having NULL values into that column any more.
I know, If I alter the column to NOT NULL will throw me an error, since it does a batch update.
Is there any way to achieve this...
Thanks...
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Sep 30, 2014
We have a database where many tables have a field that has to be lengthened. In some cases this is a primary key or part of a primary key. The table in question is:-
/****** Object: Table [dbo].[DTb_HWSQueueMonthEnd] Script Date: 09/25/2014 14:05:09 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[DTb_HWSQueueMonthEnd](
[Code] ....
The script I am using is
DECLARE@Column varchar(100)--The name of the column to change
DECLARE@size varchar(5)--The new size of the column
DECLARE @TSQL varchar(255)--Contains the code to be executed
DECLARE @Object varchar(50)--Holds the name of the table
DECLARE @dropc varchar(255)-- Drop constraint script
[Code] ....
When I the the script I get the error message Could not create constraint. See previous errors.
Looking at the strings I build
ALTER TABLE [dbo].[DTb_HWSQueueMonthEnd] DROP CONSTRAINT PK_DTb_HWSQueueMonthEnd
ALTER TABLE [dbo].[DTb_HWSQueueMonthEnd] Alter Column [Patient System Number] varchar(10)
ALTER TABLE [dbo].[DTb_HWSQueueMonthEnd] ADD CONSTRAINT PK_DTb_HWSQueueMonthEnd PRIMARY KEY NONCLUSTERED ([Patient System Number] ASC,[Episode Number] ASC,[CensusDate] ASC)
WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
They all seem fine except the last one which returns the error
Msg 8111, Level 16, State 1, Line 1
Cannot define PRIMARY KEY constraint on nullable column in table 'DTb_HWSQueueMonthEnd'.
Msg 1750, Level 16, State 0, Line 1
Could not create constraint. See previous errors.
None of the fields I try to create the key on are nullable.
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May 3, 2007
I receive this message when I try to run any report. The reportserver and reportservertempdb databases were upgraded using backup/restore from SQL2000 to SQL2005 on a separate server which is running RS2005 . Please help. Thanks
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Jul 31, 2013
I need to periodically send a set of data to a vendor. They need to have a column what is an unique identifyer but they cannot handle 16 digit GUI.So I have this my_old_person table with person_GUI as uniqueidentifier. It got 200K rows in it. I am thinking creating a staging utility table:
Create table my_new_person
(person_GUI varchar(255) not null,<--this will contains the same GUI from the old
Person_ID nvarchar(20))<--send tis to vendor
At the beginning of my nightly ETL, I will run this to get the new data:
Insert into my_new_person
select a.person_GUI, xyz
from my_old_person a join my_new_person b
on a.person_GUI=b.person_GUI
where not exists (Select person_GUI from my_old_person)
How do I implement this person_ID to make it unique and populate correctly in above xyz?
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Sep 3, 2015
I have an SSIS package that imports data from an Excel file, replaces any value in Excel that reads "NULL" to "", then writes the data to a couple of databases.
What I have discovered today, is I have two columns of dates, an admit date and discharge date column, and what I need to do is anywhere I have a null value in the discharge date column, I have to replace it with the value in the admit date column.Â
I have searched around online and tried a few things using the Replace funtion in Derived columns but no dice so far.Â
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Dec 13, 2004
I have been discussing with some coworkers whether or not it makes sense to invest the time to alphabetize the column names in our tables (aside from the PK and possibly FK's that could be listed first). My reasoning for doing so would make it much easier to scan the list of columns in a table that I was not familiar with to see if it contained a particular column (i.e. meeting_id). I was just wondering if this is common at all in our industry for new DB design (I realize why legacy systems would not be ordered in this way). I remember seeing MSFT designed their tables this way when Site Server first came out.
An argument was made that when you add a new column you would insert it into the appropriate location and in order to make this happen, EP needs to create a temp table, move the data and consequently lock the table until the data has been transferred. While this is correct, I do not see this negative as outweighing the positive experience achieved by scanning a list of fields in a table in a more orderly fashion.
Thoughts?
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Apr 3, 2008
I have a Member table and I have a MemberView.
I want the view to return the "count" from a complex query related to the Member record and I'm looking for a good way to do that.
I was thinking:
select M.*, (select count(*) from UDF)
but that just smells bad.
Any pointers would be great.
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Mar 6, 2015
I have a ipaddress column is there where i need to split the column into two columns because of values like below
172.26.248.8,Fe80::7033:acba:a4bd:f874
172.26.248.8,Fe80::7033:acba:a4bd:f874
172.26.248.8,Fe80::7033:acba:a4bd:f874
I have written the below query but it will throuh some error.
 select SUBSTRING(IPAddress0, 1, CHARINDEX(',', IPAddress0) - 1) as IPAddress0Â
  from IPADDRESS
error:
Msg 537, Level 16, State 2, Line 1
Invalid length parameter passed to the LEFT or SUBSTRING function.
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Oct 20, 2015
can you have constraints as such [CreateBy] [nvarchar](30) NOT NULL DEFAULT (suser_sname()),on a table that has a column store index in SQL Server 2012,2014, or 2016?
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Sep 9, 1998
I want to modify this column:
codkey int NULL
to:
codkey int NOT NULL
How can I do that in SQL Server?
I think it must be very simple
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Jun 5, 2007
Hi.I've read up on this, and have something that works, but I was wondering ifthere is anything I'm overlooking with this.Situation is:I have a bunch of tables.. I need to modify table2 as part of an upgrade of adatabase schema.I am using T-SQL scripts to do the trick which I'm writing myself.I need to add a new varchar(8) column that is not null to the primary key.I have a default I would like to use for the initial ddl modification.I want to get rid of the default after the modification is complete, but leavethe column not null for future operations...(Some if the code I'm using I took from one of Erlands posts.. hope I'm notabusing it).Here is the code I'm using now.. it basically adds the column 'institution_id'as not null along with a default.Then I jump through a couple of hoops trying to get rid of the default.Finally I setup the primary key again.I can only feel I'm supposed to be maybe using a constraint column with a nameto do this easier/more properly.set @dynamicsql = ' alter table institution_xref add institution_idvarchar(60) not null default ''' + @default_institution_id + ''' 'EXEC (@dynamicsql)set @dynamicsql = ' alter table institution_xref alter columninstitution_id varchar(60) not null 'EXEC (@dynamicsql)select @institution_iddefault = object_name(cdefault) from syscolumnswhere id = object_id('institution_xref') and name = 'institution_id'exec(' alter table institution_xref drop constraint ' +@institution_iddefault)set @dynamicsql = ' alter table institution_xref drop constraintinstitution_xref_pk 'EXEC (@dynamicsql)set @dynamicsql = ' alter table institution_xref with nocheck addconstraint institution_xref_pk primary key clustered (originalcode,institution_id) 'EXEC (@dynamicsql)thanksJeffJeff Kish
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Dec 13, 2007
Hi,
I have a question whether set the default of column to null or non-null value as it is not easy to make a WHERE clause if the column is nullable.
Any suggestion?
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Mar 16, 2007
It is issues like this that drive a programmer insane! I am trying to figure out if I am missing something here.
I have a query like this:
SELECT CL.DivisionId FROM CompanyLabels CL, BusinessRules B WHERE CL.CompanyLabelId = B.CompanyLabelId
In my table, DivisionId is nullable and equal to NULL.
In my VS.2005 Mobile 5 application, this line is giving me fits:
if (dr["DivisionId"] != null) { MessageBox.Show(dr["DivisionId"].ToString().Length.ToString()); divisionId = Convert.ToInt32(dr["DivisionId"].ToString()); }
DivisionId passes the null check and is blank. The message box returns "0" and of course, I get a FormatError on the conversion.
I have also tried DBNull in place of null. Is there a special System.Data.SqlServerCe NULL value in the SQL CE framework that I should be using? Am I completely forgetting something here?
Thanks!
Michael
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Nov 30, 2005
I am reading "SQL Server Query Performance Tuning Distilled",on page 104 it talks about one of the index design recommendationswhich is to choose the column that has very high selectivity of valuesinstead of a column that has very few selectivity of values.My question is if I have currently indexes on my tables that have1, 2, 3, 4, ... values only on thousands of rows, are these nonclusteredindexes pretty much useless indexes that I should get rid of?And I know that pretty much the number of selectivity values willalways remain very low.Thank you
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Jan 30, 2007
I have a report requirement, i am new to reports.
I want to have two lines of column headers.( with 7 columns in parent columns header)
and 7 columns in child column header.
The first column header will show a parent record.
And after the parent record i want to show the next child related horizontal column headers and will show all child record related to the above parent record.
its a one to many: 1 parent record and below all child records for that parent record.
can i use subreports controls to show all child records of the parent.
Thank you very much for the information.
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Sep 3, 2015
We want to add a new int identity column as a primary key to an already existing table that has a primary key on Guid. Here is the DDL:
CREATE TABLE [dbo].[VRes](
[VResID] [uniqueidentifier] NOT NULL,
[Mes] [varchar](max) NOT NULL,
[PID] [uniqueidentifier] NOT NULL,
[Segt] [int] NOT NULL,
[code]....
Also we currently have 3 million rows on this table. Is having an integer column as identity column and primary key better or shd I consider using BigInt?
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Jul 22, 2015
How to Change Order of Column In Database Tables
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Aug 3, 2015
With Sql Server Management Studio, while creating/modifying a table I want to specify one of its columns to store values in lower case only. Can it be done through the designer or by some other means?
N.B.: Using SQL Server 2005.
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Oct 5, 2015
We have a vendor created database with 9000+ tables, one of which has about 6 billion rows. Â The vendor redesigned the database recently and ever since we've had terrible performance.
What the vendor did was increase any and all varchar columns (tens of thousands of columns) to 256.
Before the upgrade we had no problems creating an index on the 6billion row table, it would take 2 hours.
Now after the upgrade we've let the index creation command run for 5 days and killed it because it was consuming terabytes of logspace.
The previous design had combined column width of 1049 to what is now over 4000. The primary key itself is 1283 characters (SQL limit is 900).
There is no additional data, just wider columns. Why we are unable to create the index?
What is happening inside SQL Server? Does SQL make "room" in memory for the index for the entire width of the potential max row length?
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Nov 24, 2015
I created composite clustered index key based on Gender and Salary columnÂ
The Query executed Successfully and <g class="gr_ gr_135 gr-alert gr_tiny gr_spell undefined ContextualSpelling multiReplace" data-gr-id="135" id="135">i</g>
got composite index key id Gender(-), Salary I <g class="gr_ gr_310 gr-alert gr_gramm undefined Grammar only-ins replaceWithoutSep" data-gr-id="310" id="310">want</g> know why Gender(-) display like this?
And Gender is <g class="gr_ gr_391 gr-alert gr_spell undefined ContextualSpelling ins-del multiReplace" data-gr-id="391" id="391">nvarchar</g>Â (20)Â
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Sep 20, 2006
Hey. I need to substitute a value from a table if the input var is null. This is fine if the value coming from table is not null. But, it the table value is also null, it doesn't work. The problem I'm getting is in the isnull line which is in Dark green color because @inFileVersion is set to null explicitly and when the isnull function evaluates, value returned from DR.FileVersion is also null which is correct. I want the null=null to return true which is why i set ansi_nulls off. But it doesn't return anything. And the select statement should return something but in my case it returns null. If I comment the isnull statements in the where clause, everything works fine. Please tell me what am I doing wrong. Is it possible to do this without setting the ansi_nulls to off??? Thank you
set ansi_nulls off
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
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May 7, 2007
I am trying to create a drop down list with the possible usernames that you can send an email to.  Everything works fine except for the dropdown list and I get the following error message:Cannot insert the value NULL into column 'EmailTo', table 'db191165913.dbo191165913.Email'; column does not allow nulls. INSERT fails.The statement has been terminatedMy code is below:<%@ Page Language="VB" MasterPageFile="~/real_world/realworld_MasterPage.master" AutoEventWireup="false" CodeFile="send_messages.aspx.vb" Inherits="send_messages" title="Untitled Page" %><asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server"> <asp:Label ID="email_label" runat="server" Visible="False"></asp:Label> <asp:SqlDataSource ID="emailsend_source" runat="server" ConnectionString="<%$ ConnectionStrings:IMS_DB %>" DeleteCommand="DELETE FROM WHERE [EmailID] = @EmailID" InsertCommand="INSERT INTO ([UserID], [EmailTo], [EmailFrom], [Subject], [Message], [Status], [Reply], [Forward], [UserName], [SentOn], [IP], [BrowserInfo], [DNSInfo]) VALUES (@UserID, @EmailTo, @EmailFrom, @Subject, @Message, '@Status', '@Reply', '@Forward', @UserName, @SentOn, @IP, @BrowserInfo, @DNSInfo)" SelectCommand="SELECT * FROM WHERE ([UserID] = @UserID)" UpdateCommand="UPDATE SET [UserID] = @UserID, [EmailTo] = @EmailTo, [EmailFrom] = @EmailFrom, [Subject] = @Subject, [Message] = @Message, [Status] = @Status, [Reply] = @Reply, [Forward] = @Forward, [UserName] = @UserName, [BrowserInfo] = @BrowserInfo, [DNSInfo] = @DNSInfo WHERE [EmailID] = @EmailID"> <DeleteParameters> <asp:Parameter Name="EmailID" Type="Int32" /> </DeleteParameters> <UpdateParameters> <asp:Parameter Name="UserID" /> <asp:Parameter Name="EmailTo" Type="String" /> <asp:Parameter Name="EmailFrom" Type="String" /> <asp:Parameter Name="Subject" Type="String" /> <asp:Parameter Name="Message" Type="String" /> <asp:Parameter Name="Status" Type="String" /> <asp:Parameter Name="Reply" Type="String" /> <asp:Parameter Name="Forward" Type="String" /> <asp:Parameter Name="UserName" Type="String" /> <asp:Parameter Name="BrowserInfo" Type="String" /> </UpdateParameters> <SelectParameters> <asp:ControlParameter ControlID="email_label" Name="UserID" PropertyName="Text" /> </SelectParameters> <InsertParameters> <asp:Parameter Name="UserID" /> <asp:Parameter Name="EmailTo" Type="String" /> <asp:Parameter Name="EmailFrom" Type="String" /> <asp:Parameter Name="Subject" Type="String" /> <asp:Parameter Name="Message" Type="String" /> <asp:Parameter Name="Status" Type="String" /> <asp:Parameter Name="Reply" Type="String" /> <asp:Parameter Name="Forward" Type="String" /> <asp:Parameter Name="UserName" Type="String" /> <asp:Parameter Name="IP" Type="String" /> <asp:Parameter Name="SentOn" Type="datetime" /> <asp:Parameter Name="BrowserInfo" Type="String" /> <asp:Parameter Name="DNSInfo" Type="String" /> </InsertParameters> </asp:SqlDataSource> <asp:SqlDataSource ID="username_email" runat="server" ConnectionString="<%$ ConnectionStrings:IMS_DB %>" SelectCommand="SELECT [UserName] FROM [Membership] ORDER BY [UserName]"> </asp:SqlDataSource> <asp:ValidationSummary ID="ValidationSummary1" runat="server" HeaderText="You must fill out the following forms:" ValidationGroup="email_send" /> <asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateRows="False" DataKeyNames="EmailID" DataSourceID="emailsend_source" DefaultMode="Insert" GridLines="None" Height="50px" Width="125px"> <Fields> <asp:BoundField DataField="EmailID" HeaderText="EmailID" InsertVisible="False" ReadOnly="True" SortExpression="EmailID" /> <asp:TemplateField HeaderText="To" SortExpression="EmailTo"> <EditItemTemplate> <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("EmailTo") %>'></asp:TextBox> </EditItemTemplate> <InsertItemTemplate> <asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="emailsend_source" DataTextField="UserName" SelectedValue='<%# Bind("UserName") %>' AppendDataBoundItems="True" DataValueField="UserName"> <asp:ListItem>-- Receiving User --</asp:ListItem> </asp:DropDownList> <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="DropDownList1" Display="Dynamic" ErrorMessage="Message Receiver (To)" ValidationGroup="email_send"></asp:RequiredFieldValidator> </InsertItemTemplate> <ItemTemplate> <asp:Label ID="Label1" runat="server" Text='<%# Bind("EmailTo") %>'></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="From" SortExpression="EmailFrom"> <EditItemTemplate> <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("EmailFrom") %>'></asp:TextBox> </EditItemTemplate> <InsertItemTemplate> <asp:LoginName ID="login_name" runat="server" /> </InsertItemTemplate> <ItemTemplate> <asp:Label ID="Label2" runat="server" Text='<%# Bind("EmailFrom") %>'></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="Subject" SortExpression="Subject"> <EditItemTemplate> <asp:TextBox ID="TextBox3" runat="server" Text='<%# Bind("Subject") %>'></asp:TextBox> </EditItemTemplate> <InsertItemTemplate> <asp:TextBox ID="TextBox3" runat="server" MaxLength="50" Text='<%# Bind("Subject") %>' ValidationGroup="send_email"></asp:TextBox> <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="TextBox3" Display="Dynamic" ErrorMessage="Subject" ValidationGroup="email_send"></asp:RequiredFieldValidator> </InsertItemTemplate> <ItemTemplate> <asp:Label ID="Label3" runat="server" Text='<%# Bind("Subject") %>'></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="Message" SortExpression="Message"> <EditItemTemplate> <asp:TextBox ID="TextBox4" runat="server" Text='<%# Bind("Message") %>'></asp:TextBox> </EditItemTemplate> <InsertItemTemplate> <asp:TextBox ID="TextBox4" runat="server" Columns="40" MaxLength="500" Rows="10" Text='<%# Bind("Message") %>' TextMode="MultiLine" ValidationGroup="send_mail"></asp:TextBox> <asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ControlToValidate="TextBox4" Display="Dynamic" ErrorMessage="Message" ValidationGroup="email_send"></asp:RequiredFieldValidator> </InsertItemTemplate> <ItemTemplate> <asp:Label ID="Label4" runat="server" Text='<%# Bind("Message") %>'></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:CommandField InsertText="Send Message" ShowInsertButton="True" ValidationGroup="email_send" /> </Fields> </asp:DetailsView></asp:Content>
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Apr 14, 2008
Hi i get the above error whenever i try and run my page, what i am trying to do is embed a repeater within a datalist, here is my code;public void Page_Load(object sender, EventArgs e)
{string strID = Request.QueryString["id"];
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["streamConnectionString"].ConnectionString);SqlCommand command = new SqlCommand("stream_Users", conn);
command.CommandType = CommandType.StoredProcedure;command.Parameters.Add("@userID", SqlDbType.Int).Value = Request.QueryString["id"];
SqlDataAdapter cmd1 = new SqlDataAdapter(command);
//Create and fill the DataSet.DataSet ds = new DataSet();
cmd1.Fill(ds, "userName");
//Create a second DataAdapter for the Titles table.SqlDataAdapter cmd2 = new SqlDataAdapter("select * from UserSpecialties", conn);
cmd2.Fill(ds, "specialty");
//Create the relation bewtween the Authors and Titles tables.ds.Relations.Add("myrelation",
ds.Tables["userName"].Columns["userID"],ds.Tables["specialtyName"].Columns["userID"]);
//Bind the Authors table to the parent Repeater control, and call DataBind.DataList1.DataSource = ds.Tables["userName"];
Page.DataBind();
//Close the connection.
conn.Close();
}
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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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Jul 12, 2002
Hi,
I have a table in which out of 20 columns, there will be data only in a few columns. So, I need to find those column names which have data in them. I was able to do it using the information_schema and using a cursor to loop through all the column names and find out which columns have data in them. But i need to know if there is a more efficient way of doing this without using the cursor. Can somebody please let me know how this can be done without using a cursor? Thank you.
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Jul 26, 2006
I am trying to concatenate three columns and when one column might be NULL, the result set is NULL. I have set "concat null yields null" to false and the result is the same. Here is my code:
Code:
SELECT lname + ',' + space(1) + fname + SPACE(1) + mname as FullName
TIA
Mike
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