Preventing Duplicate Database Entries
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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Hi I have a problem. Every time I select the first Item of a dropdownlist, it prevents the Insert to the database. There are 8 droplists on the page but the insert is only effected by the First Item of lstTheme selcetion. My Insert code is here: Any ideas?? Private Sub btnInsertChange_Click(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.CommandEventArgs) Handles btnInsertChange.Command Me.SqlCommandThemeTest.Connection = Me.SqlConnection1 Dim Name As String Dim values As String Name = "Theme, Guide, GuidePage, PageType, ChangeCategory, ChangeFrom, ChangeFromText, ChangeTo, ChangeToText, ContentManager, date" values = "lstTheme, lstGuideName, lstGuidePage, lstPageType, lstChangeCategory, lstChangeFrom, txtChangeFrom, lstChangeTo, txtChangeTo, DropDownList1, txtDate" SqlCommandThemeTest.CommandText = "INSERT INTO dbo.ChangesReport (Theme, Guide, GuidePage, PageType, ChangeCategory, ChangeFrom, ChangeFromText, ChangeTo, ChangeToText, ContentManager, date) VALUES (@themeValue, @guideValue, @guidepageValue, @pagetypeValue, @changecategoryValue, @changefromValue, @changefromtextValue, @changetoValue, @changetotextValue, @contentmanagerValue, @dateValue)" SqlCommandThemeTest.Parameters.Add("@themeValue", lstTheme.SelectedItem.Text) SqlCommandThemeTest.Parameters.Add("@guideValue", lstGuideName.SelectedItem.Text) SqlCommandThemeTest.Parameters.Add("@guidepageValue", lstGuidePage.SelectedItem.Text) SqlCommandThemeTest.Parameters.Add("@pagetypeValue", lstPageType.SelectedItem.Text) SqlCommandThemeTest.Parameters.Add("@changecategoryValue", lstChangeCategory.SelectedItem.Text) SqlCommandThemeTest.Parameters.Add("@changefromValue", lstChangeFrom.SelectedItem.Text) SqlCommandThemeTest.Parameters.Add("@changefromtextValue", txtChangeFrom.Text) SqlCommandThemeTest.Parameters.Add("@changetoValue", lstChangeTo.SelectedItem.Text) SqlCommandThemeTest.Parameters.Add("@changetotextValue", txtChangeTo.Text) SqlCommandThemeTest.Parameters.Add("@contentmanagerValue", DropDownList1.SelectedItem.Text) SqlCommandThemeTest.Parameters.Add("@dateValue", txtDate.Text) Try Me.SqlConnection1.Open() Me.SqlCommandThemeTest.ExecuteNonQuery() Catch ex As Exception Response.Write(ex.ToString) Finally Me.SqlConnection1.Close() End Try Response.Redirect("WebForm3.aspx") End Sub
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Locks Preventing Backup Of Database
The database is configured for single publisher, many subscribers,merge replication. The maintenance plan started to fail a couple ofmonths ago and the database would not get backed up. After clearingall the locks, I am able to backup the database manually. The locksreturn again and I'm not able to backup the database with themaintenance plan. How can I get around the lock issue or solve it sothat I can backup the database again?Thanks,Chris
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Preventing ODBC Connections To A SQL Database
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I am trying to deploy a SQL Server Express database to a remote SQL Server 2005 host. I was planning to copy and paste the data from my local tables to the remote tables using Management Studio Express but my ISP (NTL) appears to be blocking port 1433 and preventing me from getting a connection to the remote database. Will an upgrade to SQL Server 2005 Developer Edition help me? I understand that it has a Backup & Restore Wizard but how does this work? Does it rely on a remote connection and will it fall foul of the NTL port blocking? Or, can the file that the Backup stage produces be copied into the web-based MSSQL Manager, that my web host provides, to restore to the remote database? Any help would be much appreciated.
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Scheme(s) For Preventing Fraudulent Updates To The Database
we're in a business where customers often ask for a foolproof scheme that even prevents folks with DB privileges from fraudulently inserting, updating or deleting data. The scheme must be so air tight that a judge can be convinced of its reliability. What are the most effective schemes out there?
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Orphaned Publication Information Preventing Drop Of Database
I am attempting to drop a database (sales), however I receive this message: Error 3274 is "Cannot drop the database 'sales' because it is published for replication." Yet, I no longer have any publications in this database. It seems that there is some orphaned information related to a publication that existed. Any help would be great.
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Replicating LDAP Entries To A SQL Database
I want to copy LDAP user entries from my LDAP to my MS SQL instance.But I also want them to be synchronized too. If the user is added tothe LDAP the SQL DB is changed in lockstep. The olny two options thatI have seen for doing this are to either use scripts to update eitherperiodically checks constancy or scans the logs for changes. The otheroption is to use some thrid party "metadirectory" solution.Anyone have any insight on how to do this on the cheap? (Using NescapeDS 6.1 with MSSQL)Thanks!
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Update SQL Database With Entries From MS Access
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Query Highest Entries From Database - Pls Read More.....
Hi folks, sorry for the poor explanation. Im using SQL 2000 I have a database that has a column named 'Initials' in a char in field I want to be able to return in a query the highest entries if an indiviuals initials & count from the table, so it would display some like this Initials Count DRT 51 AMS 49 JJJ 21 PLI 10 Hope u can help, thanks in advance
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User Database Missen In Sysdatabase Entries
Hi everyone, I just found out that one of my user database was missen from the sysdatabases entries. The database was missen from the EM and I queried the sysdatabases table but found nothing. The data and log files are intact in the hard drive directory. Is this a bug or what? Osas
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Is there a way to copy/duplicate and rename a database on the same server? Ineed to make a copy for another application. I appreciate any tips or adviceyou can provide!TIA - Rob
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How Do I Know If There Is A Duplicate Value In Database
hello, i am creating a user login system. When people register for the site I need a way for sql to check weather or not their is a duplicate username already in the databse. Currently, I am going through the whole member profile table searching for a duplicate name. Is there a better way to do this?
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Duplicate Records On Database
hi all, How do i avoid duplicate records on my database? i have 4 textboxes that collect user information and this information is saved in the database. when a user fills the textboxes and clicks the submit button, i want to check through the database if the exact records exist in the database before the data is saved. if the user is registered on the database, he wont be allowed to login. how can i acheive this? i thought of using the comparevalidator but i'm not sure how to proceed. thanks
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SQL 2000 Q: Duplicate Database
Hi folksI know just enough about MS-SQL to be dangerous, so feel free to warnme off this it's too much for a non-expert.We are using SQL 2000 as the back-end for website. We would like tocreate a duplicate of the database (on the same server). Then we'd usethem like this:Database A: read-write DB accessed by web administratorDatabase B: read-only 'live' DB accessed by the web serverThe smarts: setting up a way to maintain Database A, have it beaccessible internally (maybe different IP, maybe different port) andwhen a change is approved, have that change replicate to Database B tobe visible on the website.I'm wondering if it's something I can do myself with the rightreading, or I'm going to have to hire some SQL know-how to help meout.Dave
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How To Duplicate An Entire Database
I have built a template database which I'm finally pleased with, however I want to periodically duplicate the design - not data into a new database. How can I duplicate a database? I was hoping to right mouse, copy, then right mouse, paste, and then be prompted for the new name but no such luck.
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Duplicate Database Files
Hi, I've got a database called Webmine which is running with multi users. I want to duplicate it to generate archive. My problem is that I can't duplicate the MDF file (and the ldf file optionally) without detach the webmine db and reattach after the duplication. Detach this database is a problem durring this processing of duplication because we can have users always working on Webmine. Is there a way to proceed without detach Webmine ? Or perhaps it's stupid or dangerous to duplicate a DB if users are always working (that's my position but here, everybody does not agree with this position so can anybody certify I've got or not reason ? Thanks to your answers Best regards Axel
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Creating Duplicate Database
Instead of me testing my scripts on my main commerce database I was wondering if there was an easy way to duplicate my most currnet database as another database... that way if I screw up I can just delete it and try again I looked at the restore as in enterpirse manager, but I don't think thats it
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Duplicate Records In The Database
i have duplicate records, but they have unique ids. the duplicates resulted as a result of using a view to enter the data using BCP to load data from text file that had many dulicate records as part of consolidting the data i would like to get rid of the duplicate is there some way of checking if the Name, Address, Telephone and Image are the same as on a record with another then remove them. the table has the following colunms: ID, Name, Address, Telephone, Image 1, adam, 45 tree gate road, 00000 000000, adam.jpg 2, uno, 44 garstang road, 00001 000001, uno.jpg 3, adam, 45 tree gate road, 00000 000000, adam.jpg 4, brian, belgarth house, 00022 000022, adam.jpg 5, karen, 3 chester close, 00002 000002, adam.jpg 6, uno, 44 garstang road, 00001 000001, uno.jpg 7, adam, 45 tree gate road, 00000 000000, adam.jpg from the sample data you can see that there are multiple records is there a way of clensing the data using a sql command? is there any issues such as performance on clensing it etc? are there any strategies that should be implemented at the data tier so as to prevent duplication of data?
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CREATE TABLE DUPLICATE OBJECT/DUPLICATE FIELD NAME ERROR Msg 2714
Hello Everyone: I am using the Import/Export wizard to import data from an ODBC data source. This can only be done from a query to specify the data to transfer. When I try to create the tables, for the query, I am getting the following error: Msg 2714, Level 16, State 4, Line 12 There is already an object named 'UserID' in the database. Msg 1750, Level 16, State 0, Line 12 Could not create constraint. See previous errors. I have duplicated this error with the following script: USE [testing] IF OBJECT_ID ('[testing].[dbo].[users1]', 'U') IS NOT NULL DROP TABLE [testing].[dbo].[users1] CREATE TABLE [testing].[dbo].[users1] ( [UserID] bigint NOT NULL, [Name] nvarchar(25) NULL, CONSTRAINT [UserID] PRIMARY KEY (UserID) ) IF OBJECT_ID ('[testing].[dbo].[users2]', 'U') IS NOT NULL DROP TABLE [testing].[dbo].[users2] CREATE TABLE [testing].[dbo].[users2] ( [UserID] bigint NOT NULL, [Name] nvarchar(25) NULL, CONSTRAINT [UserID] PRIMARY KEY (UserID) ) IF OBJECT_ID ('[testing].[dbo].[users3]', 'U') IS NOT NULL DROP TABLE [testing].[dbo].[users3] CREATE TABLE [testing].[dbo].[users3] ( [UserID] bigint NOT NULL, [Name] nvarchar(25) NULL, CONSTRAINT [UserID] PRIMARY KEY (UserID) ) I have searched the "2714 duplicate error msg," but have found references to duplicate table names, rather than multiple field names or column name duplicate errors, within a database. I think that the schema is only allowing a single UserID primary key. How do I fix this? TIA
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Search For Duplicate Entery In Database
Hi I have created a simple application base on the video based on the 'SQL Server 2005 Express for Beginners' video No. 8.It is working great but I would like to add another feature; if an emial address (in my case userName) is entered that already exists in the database I would like to display an message say you have already subscrided.How do I search the database for a duplicate email address? Please keep it simple I am still finding my feet with aspx and c#.Cheers protected void Wizard1_FinishButtonClick(object sender, WizardNavigationEventArgs e) { SqlDataSource profilesDataSource = new SqlDataSource(); profilesDataSource.ConnectionString = ConfigurationManager.ConnectionStrings["profilesConnectionString1"].ToString(); profilesDataSource.InsertCommandType = SqlDataSourceCommandType.Text; profilesDataSource.InsertCommand = "INSERT INTO staffprofiles (userName, fullName, nickName, favouriteSaying, memorableMoment, song, farewell) VALUES (@userName, @fullName, @nickName, @favouriteSaying, @memorableMoment, @song, @farewell)"; profilesDataSource.InsertParameters.Add("userName", userNameTextBox.Text); profilesDataSource.InsertParameters.Add("fullName", fullNameTextBox.Text); profilesDataSource.InsertParameters.Add("nickName", nickNameTextBox.Text); profilesDataSource.InsertParameters.Add("favouriteSaying", favSayingTextBox.Text); profilesDataSource.InsertParameters.Add("memorableMoment", memMomentTextBox.Text); profilesDataSource.InsertParameters.Add("song", songTextBox.Text); profilesDataSource.InsertParameters.Add("farewell", farewellTextBox.Text); int rowsAffected = 0; try { rowsAffected = profilesDataSource.Insert(); } catch (Exception ex) { // Report a problem Server.Transfer("submit_problem.htm"); } finally { profilesDataSource = null; } if (rowsAffected != 1) { // Report a problem Server.Transfer("submit_problem.htm"); } else { // Everything was OK Server.Transfer("submit_success.aspx"); } }
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