Opinion On Preventing Duplicate Record Insertion
Oct 26, 2007
Hi, i need an opinion on this...to prevent the duplicate record in db,i am using unique constraints for a column or combination of column as the case may be.By reading this article http://aspalliance.com/687_Preventing_Duplicate_Record_Insertion_on_Page_Refresh.5 , i get the feeling that its not such a good idea..i am wondering,what does it imply?Does it mean that unique constraints are not reliable enough?Does it mean,it may break and let the duplicate record inserted,even though its not suppose to?I am using SQL server 2005
I have read Dino's article on dup recs and i have still not understood it completely.. i am looking for some not so complex ,full proof method,to prevent duplicate record insertion by clicking refresh or multiple (careless)clicking on submit....thanks ..
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Jan 10, 2006
My problem is that the 'INSERT INTO' query that sends the records to thetable is dynamically compiled in VBA and and the target table has a twocolumn primary key. I have made a number of attempts at getting 'WHERENOT EXISTS' to cure the problem but so far without success and previouspostings have resulted in advice to create an 'ignore duplicates' index.This solved the problem in asmuch as it allowed the SQL to insert the records that did not alreadyexist but resulted in the message appearing every time the user ran thethe query. Whilst this is not a major problem it is vaguely irritatingand I would like to find a way to stop it happening. I suspect that thesolution may involve using the @@ERROR command but I am not sure of thesyntax.RegardsColin*** Sent via Developersdex http://www.developersdex.com ***
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Jan 31, 2006
Hi all.. I've been scouring the forums for about 6 hours to no
avail. This is a really simple question. I'm trying to have
a registration page that lets the user input name, email, desired
username, and password. I want to check the username and email
fields to make sure ppl cannot sign up twice. So from what I've
gathered I have a couple of options:
1) i can set up a unique constraint on the database columns,
2) i can run a select statement before inserting,
3) i can store the whole database column in a variable then search through it.
My question is how to do option 2? All of my transactions are through a sqldatasource object in c#.
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Jul 23, 2005
I have a table using an identity column as its Primary Key and twocolumns (table reduced for simplicity) EmployeeNumber and ArrivalTime.CREATE TABLE [tblRecords] ([ID] [bigint] IDENTITY (1, 1) NOT NULL ,[EmployeeNumber] [varchar] (10) COLLATE SQL_Latin1_General_CP1_CI_ASNOT NULL ,[ArrivalTime] [datetime] NOT NULL ,CONSTRAINT [PK_tblRecords] PRIMARY KEY CLUSTERED([ID]) ON [PRIMARY]) ON [PRIMARY]GOI have an insert procedure that checks for duplicates before insertinga new record:IF (SELECT TOP 1 [ID] FROM tblRecords WHERE EmployeeNumber =@SocialSecurity) IS NULLBEGININSERT INTO tblRecords(EmployeeNumber,ArrivalTime)VALUES (@EmployeeNumber, @ArrivalTime)SELECT SCOPE_IDENTITY()ENDELSESELECT 0 AS DuplicateRecordIn 99.9% of the cases, this works well. However, in the event that theinsert attempts are literally "ticks" apart, the "SELECT TOP 1..."command completes on both attempts before the first attempt completes.So I end up with duplicate entries if the procedure is called multipletimes vey quickly. The system needs to prevent duplicateEmployeeNumbers within the past 45 days so setting the EmployeeNumberto UNIQUE would not work. I can check for older entries (45 days ornewer) very easily, but I do not know how to handle the times when theprocedure is called multiple times within milliseconds. Would aTRANSACTION with a duplicate check after the INSERT with a ROLLBACKwork in this case? Any help is greatly appreciated!-E
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Oct 24, 2007
Hi,i am using SQL server 2005 and have a table with 4 columns.Column1 is primary key,col2 is foreign key and col3 and col4 are regular data column.When the user enters the data i want to make sure that for a given foreign key(col2),entries in col3 are not duplicated.Is there a way,i can make sure this at db level,using some kind of constraints or something?Thanks a bunch..
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Mar 4, 2015
In my trivial example below I have a Nationality entity. The entity just has the code and Name attributes, with the code being an automatically generated Integer. I am inserting one record and then trying to prevent the same record being inserted, by setting the ImportType to 1:
truncate table [stg].[Nationality_1_Leaf]
insert into [stg].[Nationality_1_Leaf](importType, ImportStatus_id, BatchTag, Name)
values(1, 0, 'some batch' , 'American' )
select * From [stg].[Nationality_1_Leaf]
exec stg.udp_Nationality_1_Leaf 'VERSION_1', 1, 'some batch'
After this I truncate the staging table and repeat the process. Unfortunately a new record is entered into the Entity even though the name is identical to a record that already exists.
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Jan 10, 2008
Hi,
How can we insert multiple records in a OLEDB destination table for each entry from the source table.
To be more clear, for every record from source we need to insert some 'n' number of records into the destination table. this 'n' changes depending on the record.
how is this achieved.
thanks.
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Jul 19, 2006
Hi,
Does anyone have any sugestions as to the best way to achieve the following?
I want to display a list of products in a GridView. Against each product I want to place a button which will add the product to a "wish list" table.
I need to be able to check that the product has not already been inserted into the wish list.
Either suggested methods or links to tutorials will be appreciated.
Thanks in advance.
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Jul 20, 2005
Hi everyone,I tried to upload my database to my web host. Nevertheless as they donot give me enough permission to perform some DTS thus I have togenerate script to do it myself. The problem is MSSQL scriptgeneration operation can only generate the definitions of the objects,no data insertion sql is created.So is there any method to create insertion script for all the tablesin my database (they have automated increment key as well)Hope for your response!Thank you
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Jul 20, 2005
I have a client who needs to copy an existing sale. The problem isthe Sale is made up of three tables: Sale, SaleEquipment, SaleParts.Each sale can have multiple pieces of equipment with correspondingparts, or parts without equipment. My problem in copying is when I goto copy the parts, how do I get the NEW sale equipment ids updatedcorrectly on their corresponding parts?I can provide more information if necessary.Thank you!!Maria
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Jan 31, 2008
Hello. I currently have a website that allows appointments to be booked up for doctors. i currently have an insert record page built using ASP components. I would like to introduce some validation so that if a user tries to book an appointment date and time that is already occupied, an error message is returned saying that appointment slot is already booked. I'm quite confused how to do this. My current code looks as follows.
<%@ Page Language="C#" MasterPageFile="~/AdministratorMasterPage.master" AutoEventWireup="true" CodeFile="AddAppointment.aspx.cs" Inherits="AddAppointment" Title="Add Appointments - Bournemouth and Poole NHS Primary Care Trust" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<table style="position: relative">
<tr>
<td style="width: 45px">
<br />
</td>
<td style="width: 136px">
</td>
<td style="width: 47px">
</td>
<td style="width: 100px">
<asp:SqlDataSource ID="AppointmentsSqlDataSource" runat="server" ConnectionString="<%$ ConnectionStrings:ProgConnectionString %>"
DeleteCommand="DELETE FROM [Appointment] WHERE [PatientNo] = @PatientNo" InsertCommand="INSERT INTO [Appointment] ([PatientNo], [PatientSurname], [PatientForename], [ConsultantName], [HospitalName], [Time], [Date], [AppointmentStatus]) VALUES (@PatientNo, @PatientSurname, @PatientForename, @ConsultantName, @HospitalName, @Time, @Date, @AppointmentStatus)"
SelectCommand="SELECT * FROM [Appointment]" UpdateCommand="UPDATE [Appointment] SET [ConsultantName] = @ConsultantName, [HospitalName] = @HospitalName, [Time] = @Time, [Date] = @Date, [AppointmentStatus] = @AppointmentStatus WHERE [PatientNo] = @PatientNo">
<DeleteParameters>
<asp:Parameter Name="PatientNo" Type="Int32" />
</DeleteParameters>
<UpdateParameters>
<asp:Parameter Name="ConsultantName" Type="String" />
<asp:Parameter Name="HospitalName" Type="String" />
<asp:Parameter Name="Time" Type="DateTime" />
<asp:Parameter Name="Date" Type="DateTime" />
<asp:Parameter Name="PatientNo" Type="Int32" />
<asp:Parameter Name="AppointmentStatus" Type="String" />
</UpdateParameters>
<InsertParameters>
<asp:ControlParameter ControlID="Textbox1" Name="PatientNo" PropertyName="Text" Type="String" />
<asp:ControlParameter ControlID="Textbox3" Name="PatientSurname" PropertyName="Text" Type="String" />
<asp:ControlParameter ControlID="Textbox4" Name="PatientForename" PropertyName="Text" Type="String" />
<asp:ControlParameter ControlID="DropDownList1" Name="ConsultantName" PropertyName="Text" Type="String" />
<asp:ControlParameter ControlID="DropDownList2" Name="HospitalName" PropertyName="Text" Type="String" />
<asp:ControlParameter ControlID="DropDownList3" Name="Time" PropertyName="Text" Type="DateTime" />
<asp:ControlParameter ControlID="Textbox2" Name="Date" PropertyName="Text" Type="DateTime" />
<asp:ControlParameter ControlID="DropDownList4" Name="AppointmentStatus" PropertyName="Text" Type="String" />
</InsertParameters>
</asp:SqlDataSource>
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 45px">
</td>
<td align="left" style="width: 136px">
<asp:Label ID="Label1" runat="server" Style="position: relative" Text="Patient No"></asp:Label></td>
<td style="width: 47px">
</td>
<td style="width: 100px">
<asp:TextBox ID="TextBox1" runat="server" Style="position: relative"></asp:TextBox></td>
<td style="width: 100px">
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="TextBox1"
Display="Dynamic" ErrorMessage="RequiredFieldValidator" Style="position: relative"
Width="148px">Enter a Patient No</asp:RequiredFieldValidator></td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 45px">
</td>
<td align="left" style="width: 136px">
</td>
<td style="width: 47px">
</td>
<td style="width: 100px">
<br />
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 45px">
</td>
<td align="left" style="width: 136px">
<asp:Label ID="Label6" runat="server" Style="position: relative" Text="Patient Surname"
Width="116px"></asp:Label></td>
<td style="width: 47px">
</td>
<td style="width: 100px">
<asp:TextBox ID="TextBox3" runat="server" Style="position: relative"></asp:TextBox></td>
<td style="width: 100px">
<asp:RequiredFieldValidator ID="RequiredFieldValidator6" runat="server" ControlToValidate="TextBox3"
ErrorMessage="Enter a Surname" Style="position: relative" Width="140px"></asp:RequiredFieldValidator></td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 45px">
</td>
<td align="left" style="width: 136px">
<br />
</td>
<td style="width: 47px">
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 45px">
</td>
<td align="left" style="width: 136px">
<asp:Label ID="Label7" runat="server" Style="position: relative" Text="Patient Forename"
Width="128px"></asp:Label></td>
<td style="width: 47px">
</td>
<td style="width: 100px">
<asp:TextBox ID="TextBox4" runat="server" Style="position: relative"></asp:TextBox></td>
<td style="width: 100px">
<asp:RequiredFieldValidator ID="RequiredFieldValidator7" runat="server" ControlToValidate="TextBox4"
ErrorMessage="Enter a Forename" Style="position: relative"></asp:RequiredFieldValidator></td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 45px">
</td>
<td align="left" style="width: 136px">
<br />
</td>
<td style="width: 47px">
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 45px">
</td>
<td style="width: 136px">
<asp:Label ID="Label2" runat="server" Style="position: relative" Text="Consultant Name"></asp:Label></td>
<td style="width: 47px">
</td>
<td style="width: 100px">
<asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="SqlDataSource1"
DataTextField="UserName" DataValueField="UserName" Style="position: relative">
<asp:ListItem Selected="True">Select...</asp:ListItem>
</asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ASPNETDBConnectionString %>"
SelectCommand="SELECT aspnet_Users.UserName FROM aspnet_UsersInRoles INNER JOIN aspnet_Users ON aspnet_UsersInRoles.UserId = aspnet_Users.UserId INNER JOIN aspnet_Roles ON aspnet_UsersInRoles.RoleId = aspnet_Roles.RoleId WHERE (aspnet_Roles.RoleName = 'Consultant')"></asp:SqlDataSource>
</td>
<td style="width: 100px">
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="DropDownList1"
ErrorMessage="RequiredFieldValidator" Style="position: relative" Width="152px">Select a Consultant</asp:RequiredFieldValidator></td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 45px">
</td>
<td style="width: 136px">
</td>
<td style="width: 47px">
</td>
<td style="width: 100px">
<br />
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 45px">
</td>
<td style="width: 136px">
<asp:Label ID="Label3" runat="server" Style="position: relative" Text="Hospital Name"></asp:Label></td>
<td style="width: 47px">
</td>
<td style="width: 100px">
<asp:DropDownList ID="DropDownList2" runat="server" DataSourceID="SqlDataSource2"
DataTextField="HospitalName" DataValueField="HospitalName" Style="position: relative">
</asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:ProgConnectionString %>"
SelectCommand="SELECT [HospitalName] FROM [Hospital]"></asp:SqlDataSource>
</td>
<td style="width: 100px">
<asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ControlToValidate="DropDownList2"
ErrorMessage="RequiredFieldValidator" Style="position: relative" Width="136px">Select a Hospital</asp:RequiredFieldValidator></td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 45px">
</td>
<td style="width: 136px">
</td>
<td style="width: 47px">
</td>
<td style="width: 100px">
<br />
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 45px">
</td>
<td style="width: 136px">
<asp:Label ID="Label4" runat="server" Style="position: relative" Text="Appointment Date"></asp:Label></td>
<td style="width: 47px">
</td>
<td style="width: 100px">
<asp:Calendar ID="Calendar1" runat="server" Font-Size="Smaller" Style="position: relative" OnSelectionChanged="Calendar1_SelectionChanged" OnDayRender="Calendar1_DayRender">
</asp:Calendar>
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 45px">
</td>
<td style="width: 136px">
</td>
<td style="width: 47px">
</td>
<td style="width: 100px">
<asp:TextBox ID="TextBox2" runat="server" Style="position: relative; left: 0px; top: 8px;" Width="256px"></asp:TextBox><br />
</td>
<td style="width: 100px">
<asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" ControlToValidate="TextBox2"
Display="Dynamic" ErrorMessage="Enter a Date" Style="position: relative"></asp:RequiredFieldValidator></td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 45px">
</td>
<td style="width: 136px">
</td>
<td style="width: 47px">
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 45px; height: 26px">
</td>
<td style="width: 136px; height: 26px">
<asp:Label ID="Label5" runat="server" Style="position: relative" Text="Appointment Time" Width="132px"></asp:Label></td>
<td style="width: 47px; height: 26px">
</td>
<td style="width: 100px; height: 26px">
<asp:DropDownList ID="DropDownList3" runat="server" Style="position: relative; left: 0px; top: 0px;">
<asp:ListItem>Select...</asp:ListItem>
<asp:ListItem Value="09:00">09:00</asp:ListItem>
<asp:ListItem>09:30</asp:ListItem>
<asp:ListItem>10:00</asp:ListItem>
<asp:ListItem>10:30</asp:ListItem>
<asp:ListItem>11:00</asp:ListItem>
<asp:ListItem>11:30</asp:ListItem>
</asp:DropDownList></td>
<td style="width: 100px; height: 26px">
<asp:RequiredFieldValidator ID="RequiredFieldValidator5" runat="server" ControlToValidate="DropDownList3"
Display="Dynamic" ErrorMessage="Select a Time" Style="position: relative"></asp:RequiredFieldValidator></td>
<td style="width: 100px; height: 26px">
</td>
</tr>
<tr>
<td style="width: 45px">
</td>
<td style="width: 136px">
<br />
</td>
<td style="width: 47px">
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 45px">
</td>
<td style="width: 136px">
<asp:Label ID="Label8" runat="server" Style="position: relative" Text="Appointment Status"
Width="136px"></asp:Label></td>
<td style="width: 47px">
</td>
<td style="width: 100px">
<asp:DropDownList ID="DropDownList4" runat="server" Style="position: relative">
<asp:ListItem>Select...</asp:ListItem>
<asp:ListItem>Booked</asp:ListItem>
<asp:ListItem>Modified</asp:ListItem>
<asp:ListItem>Patient Notified</asp:ListItem>
</asp:DropDownList></td>
<td style="width: 100px">
<asp:RequiredFieldValidator ID="RequiredFieldValidator8" runat="server" ErrorMessage="Select a Status"
Style="position: relative" Width="120px" ControlToValidate="DropDownList4"></asp:RequiredFieldValidator></td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 45px">
</td>
<td style="width: 136px">
</td>
<td style="width: 47px">
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 45px">
</td>
<td style="width: 136px">
</td>
<td style="width: 47px">
</td>
<td align="center" style="width: 100px">
<asp:Button ID="Button1" runat="server" Style="position: relative" Text="Submit" OnClick="Button1_Click1" /></td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
</tr></table>
</asp:Content>
Any help would be very much appreciated.
Thanks,
James.
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Nov 17, 2015
Consider a 4 tables where 1 of them is considered to be as the parent class and the other 3 are sub-classes and they are disjoint so for every recored i insert in the parent class i want to also insert in one of the subclass according to a condition which checks a certain attribute in the recored that is also entered in the parent class .. how could this be done .
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Jan 30, 2006
Dear All,
I need to identify duplicate records in a table. TableA [ id, firstname, surname] I’d like to see records that may be duplicates, meaning both firstname and surname are the same and would like to know how many times they appear in the table
I’m not sure how to write this query, can someone help? Thanks in advance!
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Jan 14, 2007
Hi guys how do you hide duplicate records, how would I do a select statement for that
In (SELECT [AccountNo] FROM [2006_CheckHistory] As Tmp GROUP BY [AccountNo] HAVING Count(*)>1 )
I have about had it with this database I have been asked to make a report out of
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Nov 24, 2006
This is part of my trigger on table T1. I am trying to check if the records inserted to T1 is available in myDB.dbo.myTable or not (destination table). If it is available rollback T1. It does not do that although I insert the same records twice.
-- duplicate record check
SET @step = 'Duplicate record'
IF EXISTS (
SELECT i.myID, i.Type
FROM INSERTED i INNER JOIN
myDB.dbo.myTable c ON i.myID = c.myID
GROUP BY i.myID, i.Type
HAVING (COUNT(*) > 1) AND (i.Type = 'In')
)
BEGIN
ROLLBACK transaction
RAISERROR('Error: step: %s. rollback is done.', 16, 1, @step)
Return
END
What is problem?
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Nov 14, 2007
Hi EverybodyThis Code duplicate the record in the database, can somebody help me understand why that happen. Thanks a LOT CompanyName: <asp:textbox id="txtCompanyName" runat="server" /><br />Phone:<asp:textbox id="txtPhone" runat="server" /><br /><br /><asp:button id="btnSubmit" runat="server" text="Submit" onclick="btnSubmit_Click" /><asp:sqldatasource id="SqlDataSource1" runat="server" connectionstring="<%$ ConnectionStrings:dsn %>" insertcommand="INSERT INTO [items] ([smId], [iTitleSP]) VALUES (@CompanyName, @Phone)" selectcommand="SELECT * FROM [items]"> <insertparameters> <asp:controlparameter controlid="txtCompanyName" name="CompanyName" /> <asp:controlparameter controlid="txtPhone" name="Phone" /> </insertparameters></asp:sqldatasource> VBPartial Class Default2 Inherits System.Web.UI.Page Protected Sub btnSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSubmit.Click SqlDataSource1.Insert() End SubEnd Class ----------------------------------------------Yes is an Identity the Primary Key of the Table items
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May 4, 2004
In order to check that a new users ID does not already exist in the database I thought it would be a good idea to put the Insert into a Try Catch statement so that I can test for the duplicate record exception and inform the user accordingly. I was also trying to avoid querying the data base before executing the Insert.
The problem is what to actually test for. When the code throws the exception it is a big long string . .
"Violation of PRIMARY KEY constraint 'PK_Users_2__51'. Cannot insert duplicate key in object 'Users'"
I just thought that there has to be something simplar to test for than comparing the exception to the above string.
Can anyone tell me of a better way of doing this ?
(by the way I am only using Web Matrix and MSDE in case it matters)
Mark
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Nov 4, 2005
I am working on a web application that utilizes a sql server database. One of the tables is a large text file that is imported through a DTS package from a Unix server. For whatever reason, the Unix box dumps quite a few duplicate records in the nightly run and these are in turn pulled into the table. I need to get rid of these duplicates, but can't seem to get a workable solution. the query that is needed to get the records is:SELECT tblAppointments.PatientID, tblPTDEMO2.MRNumber, tblAppointments.PatientFirstName, tblAppointments.PatientLastName, tblAppointments.PatientDOB, tblAppointments.PatientSex, tblAppointments.NewPatient, tblAppointments.HomePhone, tblAppointments.WorkPhone, tblAppointments.Insurance1, tblPTDEMO2.Ins1CertNmbr, tblAppointments.Insurance2, tblPTDEMO2.Ins2CertNmbr, tblAppointments.Insurance3, tblPTDEMO2.Ins3CertNmbr, tblAppointments.ApptDate, tblAppointments.ApptTimeFROM tblAppointments CROSS JOIN tblPTDEMO2WHERE (tblAppointments.PatientID = tblPTDEMO2.MRNumber)AND tblAppointments.Insurance1 = 'MED'AND tblAppointments.ApptTypeID <> 'MTG'AND tblAppointments.ApptTypeID <> 'PNV'AND DateDiff("dd", ApptDate, GetDate()) = 0Order By tblAppointments.ApptDateMy first thought was to try to get a Select DISTINCT to work, but couldn't figure out how to do this with the query. My next thought was to try to set up constraints on the table, but, since there are duplicates, the DTS package fails. I assume there is a way to set up the transformations in a way to get this to work, but I'm not enough of an expert with SQL Server to figure this out on my own. I guess the other way to do this is to write some small script or application to do this, but I suspect there must be an easier way for those who know what they are doing. Any help on this topic would be greatly appreciated. Thanks.
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Jul 27, 2000
i'm a newbie to sql , anyone can give me suggestions on how to
remove duplicate records in a table, a table also has primary key,
thanks
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Apr 23, 2008
So I'm working on updating and normalizing an old database, and I have some duplicate records that I can't seem to get rid of. Every column is identical, right down to what is supposed to be the key. I can't right a delete query to just isolate one row, and I can't delete (or even udpate) any row in management studio. Any thoughts on how to remove the extra rows?
There is a field that's supposed to be unique, so I can write a simple query to get all of the problem rows. The only thing is that they come back in pairs.
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Nov 19, 2004
hi to all,
How to delete duplicate record in the recordset?
Thanks...
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Mar 23, 2006
Hi everybody,
I have 2 fields in a table.
Table Name--- StudentDetail
Name Address
Saju Kerala
Balaji Bangalore
Raj Kumar Tamilnadu
Saju Kerala
I want to Update one of the duplicate row as I don't have any unique id column. So can anybody update one of the the duplicate record without using any id or altering any column.
I am waiting for your reply.................
Regards,
Saju S.V
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Jul 9, 2007
Hi everybody i need help on on a query on how i can extract this... with the following table below..
id pub
1 a
1 b
2 c
2 c
I need to extract only the id and pub where pub has more than one with the same id... in the case of the above the result would be
id pub
2 c
2 c
thanks
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Feb 18, 2014
How can i keep only one record from duplicate entry.
Example
COLUMN1COLUMN2COLUMN3COLUMN4
AAA121-12
AAA121-13
AAA121-14
Here i want to keep only the top record and want to delete other 2 rows.
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Oct 23, 2006
Hi ,
How can i delete the duplicate record from a table
use Northwind
create table Emp (Ecode char(2), Ename char(10))
Insert into Emp(Ecode, Ename) values('A1','A')
Insert into Emp(Ecode, Ename) values('A1','A')
Insert into Emp(Ecode, Ename) values('A2','B')
Insert into Emp(Ecode, Ename) values('A2','B')
Insert into Emp(Ecode, Ename) values('A3','C')
Insert into Emp(Ecode, Ename) values('A3','C')
Insert into Emp(Ecode, Ename) values('A4','D')
Insert into Emp(Ecode, Ename) values('A4','D')
select * from emp order by Ecode
Thanks
ASM
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Jun 22, 2007
Hey Again,
I've been making great progress but I've hit another road block which a newbie intern like myself can't surpass. What's worse is the fact that no one is in the office today! Maybe someone can point me in the right direction with this SQL:
SELECT
r.[requestID]
,r.[requserID]
,r.[departmentID]
,CONVERT(CHAR(8),r.[submitDate],10)AS submitDate
,CONVERT(CHAR(8),r.[dueDate],10)AS dueDate
,CONVERT(CHAR(8),r.[revisedDueDate],10) AS revisedDueDate
,r.[reqStatus]
,r.[completedDate]
,d.[departmentName]
,s.[statusName]
,u.lastName + ', ' + u.firstName AS submittedBy
,ra.userID
FROMtblUserDepartment ud
INNER JOIN tblRequest rON ud.departmentID = r.departmentID
INNER JOIN tblDepartment dON r.departmentID = d.departmentID
INNER JOIN tblStatus sON r.reqStatus = s.statusID
INNER JOIN tblUser uON r.requserID = u.userID
LEFT JOIN tblRequestAssignee ra ON r.requestID = ra.requestID
WHEREud.userID= @userID
This works great except for one thing. In tblRequestAssignee, you have 1 primary assignee and can have several other assignees (that are not primary). This is denoted by a bit field "isPrimaryAssignee" in tblRequestAssignee. When I run the query, I see every request I want to but it duplicates requests with more than one assignee. What I'm trying to do is make only the primaryAssignee display if there is one. If there's not, then null is displayed (which is already happening).
Like I said, the query is mostly working right except for this duplicate record that displays when there's 2 assignees. Any help would once again be greatly appreciated.
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Jul 5, 2007
1 Protected Sub btnSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSubmit.Click
2 Dim sqlStr As String
3 Dim sqlStr2 As String
4 Dim myConnection As MySqlConnection = Nothing
5 Dim myCommand As MySqlCommand = Nothing
6 Dim myConnection2 As MySqlConnection = Nothing
7 Dim myCommand2 As MySqlCommand = Nothing
8 Dim myReader As MySqlDataReader = Nothing
9 Dim IC As String
10
11 IC = txtIC1.Text + "-" + txtIC2.Text + "-" + txtIC3.Text
12
13
14 Try
15 sqlStr2 = "SELECT * FROM User WHERE uLogin='" & txtUserName.Text.Trim() & "'"
16
17 ' Connection
18 myConnection2 = New MySqlConnection(ConfigurationManager.ConnectionStrings("dbConnection").ToString())
19 myConnection2.Open()
20 ' Command
21 myCommand2 = New MySqlCommand(sqlStr2, myConnection2)
22 ' Reader
23 myReader = myCommand2.ExecuteReader()
24 Catch ex As Exception
25 ' Exception Error Here
26 Response.Write(Err.Number & " - " & Err.Description)
27
28 End Try
29 ' Checking
30 If myReader.Read() Then
31
32
33 Label2.Text = "Username already exist. Please choose another username"
34 Label3.Text = "*"
35
36 Else
37
38 Try
39
40
41 sqlStr = "INSERT INTO userapplication(uaName,uaIC,) VALUE (?uName,?uIC )"
42
43
44
45 ' Connection
46 myConnection = New MySqlConnection(ConfigurationManager.ConnectionStrings("dbConnection").ToString())
47 myConnection.Open()
48 'Command
49 myCommand = New MySqlCommand(sqlStr, myConnection)
50
51 myCommand.Parameters.AddWithValue("?uName", txtName.Text)
52 myCommand.Parameters.AddWithValue("?uIC", IC)
53
54
55 myCommand.ExecuteNonQuery()
56 myConnection.Close()
57 Response.Redirect("Register.aspx", False)
58
59 Catch ex As Exception
60 ' Exception Error Here
61 Response.Write(Err.Number & " - " & Err.Description)
62 Finally
63 ' Clean Up
64 If Not IsNothing(myCommand) Then
65 myCommand.Dispose()
66 End If
67 '
68 If Not IsNothing(myConnection) Then
69 If myConnection.State = Data.ConnectionState.Open Then myConnection.Close()
70 myConnection.Dispose()
71 End If
72 End Try
73
74
75 End If
76
77 End Sub
78
79
above is my code for the user registration page.the code that i bold,which with number 55,56 and 57,are where the problem occur.
when it run,it run 55, then 57,then back to 55, then 57 again
means that my db hav duplicate record being insert
anyone know how to solve this problem?
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Feb 27, 2002
I have a table with 2 columns, col1 is unique, col2 is not.
col1 is numeric col2 is varchar.
Here is the problem,
col2 will have duplicate values, I need the largest numeric value from col1 with unique value from col2.
Thanx for any help.
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Oct 30, 2000
Using Transact-SQL how can I copy all fields except one from one record to another? The field in question being the identity field. Since, this field cannot be duplicated a simple INSERT statement fails. How can I specify an exclusion list of fields?
-Sumit
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Oct 10, 2006
I have the following query I am using to identify duplicate records in one of my database tables:
Code:
SELECT memberID,
COUNT(memberID) AS NumOccurrences
FROM ChapterMembers
GROUP BY memberID
HAVING ( COUNT(memberID) > 1 )
Executing the above proc returns 4079 records...
Now, I would also like to know the ChapterID for each member with a duplicate record. ChapterID is also stored in the ChapterMembers Table...
I tried running the following procedure:
Code:
SELECT memberID,
COUNT(memberID) AS NumOccurrences, chapterID
FROM ChapterMembers
GROUP BY memberID, chapterID
HAVING ( COUNT(memberID) > 1 )
But zero results are returned ...
The ultimate goal here is to identify duplicate records where one of their chapterID's = '81017' and to delete that record from the database.
Anyone have any ideas what I am doing wrong? Also, any suggestions for removing the records would be appreciated.
Thanks,
Jandrews
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May 2, 2014
I am new in SQL programming world, following is query that i had created
select interfaces.nodeid as 'Node Id',
nodes.caption as 'Node Name',
netflowsources.Lasttime as NetflowLastTime
from interfaces inner join nodes on interfaces.nodeid = nodes.nodeid
inner join netflowsources on interfaces.interfaceid = netflowsources.interfaceid
where netflowsources.LastTime NOT LIKE GETDATE()
which is from that query i get a return successfully, but i just noticed that, for column nodeid was showed me multiple duplicated records, for example
nodeid value = a,a,a,b,b,c,c,c,c,d,d,d
But what i expected was to get a return without any duplicate record within it. and i also have tried using "distinct" command, but that only impacted on "a" value, but others value not change at all.
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Mar 26, 2008
Hi ,
i am using sql server 2005.
i have one table where i need to find records that have same citycode and hospitalcode and doctorcode then delete the record keeping only one record of them
my problem is table structure have idendtity column which is unique.
that is m table structure is something like
recid citycode hospcode doctorcode otherdesp
1 0001 hp001 d0001 ...
2 0002 hp002 d0002 ...
3 0001 hp001 d0001 ...
4 0002 hp002 d0002 ...
please suggest
thank you
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Sep 13, 2006
Ok, this thing is returning the last record twice. If I have only one record it returns it twice, multiple records gives me the last one twice. I am sure some dumb pilot error is involved, HELP!
Thanks in advance, Larry
ALTER FUNCTION dbo.TestFoodDisLikes
(
@ResidentID int
)
RETURNS varchar(250)
AS
BEGIN
DECLARE @RDLike varchar(50)
DECLARE @RDLikeList varchar(250)
BEGIN
SELECT @RDLikeList = ''
DECLARE RDLike_cursor CURSOR
LOCAL SCROLL STATIC
FOR
SELECT FoodItem
FROM tblFoodDislikes
WHERE (ResidentID = @ResidentID) AND (Breakfast = 'True')
OPEN RDLike_cursor
FETCH NEXT FROM RDLike_cursor
INTO @RDLike
SELECT @RDLikeList = @RDLike
WHILE @@FETCH_STATUS = 0
BEGIN
FETCH NEXT FROM RDLike_cursor
INTO @RDLike
SELECT @RDLikeList = @RDLikeList + ', ' + @RDLike
END
CLOSE RDLike_cursor
DEALLOCATE RDLike_cursor
END
RETURN @RDLikeList
END
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