Modules & VBA :: Preventing Probable Duplicate Records
Jun 21, 2013
I have a table called tblCompanies in which I have a field called CompanyName that is indexed set to "no duplicates". However, I want access to be able to pick out probable duplicates instead of only exact duplicates.
So, for example, if "Butter Fingers" is entered and "Butterfingers" is already in the database, I want access to prevent the new record from being created.
The code I found on MS Developer's reference only prevents exact duplicates which seems pointless since this can be done just as effectively on the table level using an index.
Anyway, here is the code:
Private Sub CompanyName_BeforeUpdate(Cancel As Integer)
If (Not IsNull(DLookup("[CompanyName]", _
"tblCompanies", "[CompanyName] ='" _
& Me!CompanyName & "'"))) Then
MsgBox "Company has already been entered in the database."
Cancel = True
Me!CompanyName.Undo
End If
End Sub
Can it somehow be modified to do what I want it to do?
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Aug 11, 2011
I have two different fields in a table. Month/Year and Location.When a user is entering data in a form, I want a message to be displayed if the location AND month/year are the same to tell the user that they are entering a duplicate record. I can't put unique keys on either of these fields because there is going to have to be duplicates in each field.
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Jul 22, 2005
I have a table with a multi-field unique index:
PatientID
TestId
TestDate
Examiner
The problem is, date and/or examiner can be blank until that information is updated. I want those null values to be understood as actual values so that multiple instances of that "waiting to be updated" record do not occur. Is it possible for Access to understand my indexes in the following way?
PatientID----TestID----TestDate----Examiner----(Index)
1------------1---------07/18/05----AD----------1107/18/05AD
1------------1---------[blank]------[blank]------11
and therefore not allow another record like the second one to be added? The ignore nulls property of my index doesn't seem to affect this issue?
Thanks!
Carly
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Oct 24, 2006
I have a form which allows the user to book rooms.
On this form, there are the following fields:
BookingID: (Autonumber)
RoomID: Text box
Time:Text Box
Date: Text Box
Class: Text Box
Teacher: Text Box
The form adds this information to the Booking table.
What I'm looking to do is prevent the user from double booking a room,like being able to check if the Room is already booked at that time and date, before the new information is added to the table and the room becomes double booked.
Basically this would be checking the RoomID, Time and Date fields, as everything else is irrelevant. What would be the best way to do this?
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Nov 26, 2006
Hi again, thanks to all for the help given so far.
Is there anyway (other than making that field a primary key) to prevent the same value being entered into a different record?
E.g.
If under 'Name' Radion has already been written, I want an error message coming up saying there is already a record with radion.
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Aug 2, 2006
Hi all,
I am currently using this code in the before Update event of the Surname Textbox on a form. The first Textbox is FirstName.
The second one is Surname.
************************************************** **
If (Not IsNull(DLookup("[FirstName]", _
"Employee", "[FirstName] ='" _
& Me!FirstName & "'"))) And (Not IsNull(DLookup("[Surname]", _
"Employee", "[Surname] ='" _
& Me!Surname & "'"))) Then
MsgBox "Someone already exists with the same name! Please check for duplicates", vbCritical, "IPDMS"
Me.Undo
End If
************************************************** **
However once the user has entered the surname and tries to save the record the MsgBox is coming up.
Basically what is happening is the first name is coming up as the duplicate entry only.
I need to prevent the whole name (first name and surname together) from being duplicated.
Thanks if you can help me.
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Aug 23, 2006
Hi all,
I created a form for entering employee skillset in Accounting.
I have set up three fields - one for Primary Skillset and the other two for secondary skill sets -
The skillsets are -Payables, Receivables, General Ledger, Purchasing etc.
How can I ensure that a user will not enter duplicate values in the three fields.
That is a user will not enter for examply "Payables" in the Primary Skillset, and Secondary Skillset fields.
I tried creating a multiple field index but it does ont appear to work.
I will appreciate all the help.
Thanks
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Mar 7, 2014
I am attempting to make a system where the lifespan of baskets in a production process can be tracked. In order to do this I am looking to create a form to input when a new basket is introduced.Each basket has a 'disc' associated with a number on (BasketNumber), however these discs are reused once the basket breaks which is making it more difficult.
I have a form (Add_New_Basket) which feeds into a table (Active_Basket); what I am trying to do is make sure that a new basket cannot be introduced with the same disc number as an active basket. The way I am trying to determine which baskets are active is that I have an end date, that is filled in once the basket has been scrapped.
Therefore I am trying to set my Add_New_Basket form to restrict me entering a new record with BasketNumber 999, if there is already a BasketNumber 999 in the table with 'EndDate' null. If there is BasketNumber 999 and EndDate is dd/mm/yyyy then it can create the entry.My form Add_New_Basket has fields ID (which is hidden), BasketNumber, StartDate (=Date()).My table has fields: ID, BasketNumber, StartDate, EndDate
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Feb 24, 2007
I have a fairly simple database we are using for keeping inventory and new items get added through a form. Is there A way I can prevent a part number and its properties from being entered if that same part number has already been entered at an earlier point in time?
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Mar 4, 2008
Hello All,
I'm trying to limit the data entered into a specifc field, but also the data must be unique with respect to other fields.
i.e.
Two fields: System A & System B.
Data entered into System A, can not be entered into System B.
Anyway to prevent this from recurring?
Would I use a validation rule?
Thanks in advance
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May 5, 2014
I am working on a database to track IT assets with third parties. I have a table called "Equipment" that includes info like model, serial numbers, purchase price, date, location, and "Asset ID". I have a second, single field table called "asset tag" that is just a list of asset ID tags, XYZ1000, XYZ1001, XYZ1002..
I created a one to one relationship between the two tables on the following fields: "equipment.assetID" and "asset tag.asset ID"
Once an "asset ID" is used, I would like it to either be grayed out or disappear from the list of available ID tags. Basically, I want it so that each "asset tag. Asset ID" can only be used once.
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Apr 15, 2013
I want to stop duplicate entries from being entered on form. I have read through the thread , however I am totally confused as it seemed to be v high level complex queries. I am looking at:
Preventing duplicate entries to be entered
It should show an error "Saying entry already exists" Do you want to check,edit or add new...
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Aug 13, 2014
What is the code for displaying warning message when enterenig duplicate information in unbound form in BeforeUpdate event procedure.
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Jun 29, 2013
What would be the Access 2007 VBA code for checking for duplicate records?
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Jun 12, 2014
I have a table which has duplicate records so I want to write down the code so that when the user click on a button then it should remove the duplicate records from the table.
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Apr 14, 2014
I have a table it contains a list of opening and closing values along with a date and a couple control fields. What I would like to do is duplicate a few fields from records that meet a criteria onto the same table. After that is done there will be a few updates on the new records. Looking at it, it would be: 'duplicate' where field2 <> 0 and field5 = No and field6 = Yes. All other fields on the newly created records would be their default values.
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Oct 21, 2014
How to give a VBA code for duplicate records is without entry in Subform datasheet. I just used in the screenshot code but that is not working properly. how to change a vba code for without entry duplicate names.
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Nov 20, 2013
I am working with a sub-form where once a staff member enters there sub measure I would want to create a duplicate of that record. The problem I am having is that once you enter the sub-form and click the duplicate button it creates a duplicate of the record selected but overwrites the first record in the table. I want it to create a new SubMeasure Number which is the primary key and assigns the record the next available number.
Also if I try to add another record after one has been added I get runtime error "3021" - No current record. I would have to close the form and reopen for it to be able to add again.
I have attached the code below:
Private Sub cmdDuplicate_Click()Dim dbs As DAO.Database, Rst As DAO.Recordset
Dim F As Form
'Return Database variable pointing to current database
Set dbs = CurrentDb
Set Rst = Me.RecordsetClone
[code]....
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Jun 27, 2014
I have almost no experience of VBA outside of working a little with codes generated for me like docmd etc.
I am trying to create a database for resourcing staff.
I have a form where the user inputs a start date and an end date which updates a table.
I have a query that works out the number of working days between those dates.
I have a table with all the working dates between now and 2016
I want to put a duplicate record button on the form (I can do that bit)
The tricky part is I want it to create a new record for each date in the dates table between the start and end dates.
Example 23/06/2014-18/07/2014 = 20 working days. I want to end up with 20 records with start dates as below and the same end date.
23/06/2014, 24/06/2014,25/06/2014,26/06/2014,27/06/2014,30/06/2014,01/07/2014,02/07/2014,03/07/2014,04/06/2014,07/07/2014 etc up to 18/07
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Nov 24, 2014
I have some code which creates a record in an external csv file to provide information to upload a vehicle to the website. It works fine with the exception of creating duplicates when, for example an option to amend a record is given to the user before continuing to a new record. The option has to be in place in case there is an error in the specifics of what is important to be recorded in the database and under such circumstances the form code allows the user to tab through the form and correct any errors, but this creates duplicate entries in the csv file as the user has to pass through the 'SavePrintVehPurch_Exit' button a second time after corrections are made.
I am wondering if there is a way of altering the following code to effectively look look to see if the csv record exists and if so correct any changed field information rather than create a whole new record or create a new record where the record does not exist - The record in the csv file is determined by the 'Me.VP_VehRegMark.Value '.
Private Sub SavePrintVehPurch_Exit(Cancel As Integer)
Dim fileText As String
Dim fileName As String
Dim fileNumber As String
fileNumber = FreeFile
[Code] ....
I am wondering about introducing the something like the following ( but can't work out how to clarify comparison of the fields)
If Len(filename(fileText)) = ? Then
Do not change entry
Else
Overwrite the new detail
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Jun 13, 2013
I have a code that works great from the parent form but I decided to change the format and call it from a lostfocus event in the subform instead. Now I keep getting error 3314:"You must enter a value in the tbGuests.LastName field".
The code should copy the parent form fields and create x number of duplicate records according to a field on sub-form. It then runs an append query to add the information from the subform.
Code:
Private Sub GuestsInParty_LostFocus()
Dim partymsg As Integer
Dim dbs As dao.Database, rst As dao.Recordset
Dim F As Form
Dim intHowMany As Integer
Dim intCounter As Integer
[code]....
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Feb 22, 2005
Hello everyone.
It has been many years since I played with this stuff and I probably wouldn't be now, if not for an emergency.
I know there is probably an example here that all ready explains what I need, but honestly, I am not real familiar with the terms and wouldn't know where to begin looking for it.
I am old and don't intend to make a career out of this, I just need to fix a database. We had a bookkeeper at our small business who, for years, maintained our mailing list. It was her own design, though she knew nothing about it and learned as she went along. We never interfered because she did her job flawlessly in her own little, confussing round-a-bout way.
She is gone now and we have to make heads or tails of this. We decided the quickest and easiest way was to blow the old db away, use as much of the basic fields that we could sacrifice and start over. It's just a simple mailing list, but it contains over 9000 records.
Her method of entering records was from the table view. Yep, starting a new line at the bottom of the table and then entering the 94 fields of information that applied to the new record.
I have created a form today that does this now and simplifies this process.
Her method of preventing multiple records, was to scroll down the table and see if she had already entered the record previously. This is my question.
My first approach to resolving this issue in my new form, was to create a ComboBox on the form to do a lookup using Last and FirstName. Due to the fact that this ComboBox will need additional fine tuning that I don't understand, when I use it, it does auto-complete the last name "Anderson" as I type it and it highlights the first "Anderson" record in the db, but It doesn't do any sorts in this same ComboBox to bring the rest of the "Anderson" records to the top so I can then check for a matching FirstName. I'm sure this requires changes in the property of the ComboBox that I don't understand.
Or, maybe I shouldn't even be using the ComboBox.
Actually, I would bet there is a way that I can alter my table so that it would not allow me to put in a duplicate record and therefore, eliminating the need to even look anything up.
Any ideas or direction with this would be greatly appreciated. Since I am only the person creating this and not the person(s) that will actually be using it, I should find a method for this that will be simple for anyone adding records.
Hopefully, in a day or so, I can be done with this and get back to my real job here as a mechanic, not a programmer. :eek:
Thanks again in advance.
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Dec 2, 2012
I am new to Access and have made a database for a shuttle company that keeps track of their bookings. I need to prevent from the same booking being entered twice. I have a "Booking Form" that was made from a table "Master List". I was wondering if there was a way to compare three of the fields and if they match then a error would pop up.
I think if the "client's name", "booking date", and "pick up time" matched then a "booking already exists"... and also there are four different people can enter data and they have a log in form how can I get their "username" to be put into a field on the "Master List" automatically...
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Mar 10, 2014
I'm using the following code to ask the user whether to save changes to the data, don't save changes or Cancel the close and continue editing. I'm closing the form using the 'X' only.
Code:
Private Sub Form_BeforeUpdate(Cancel As Integer)
Dim UserResp As Integer
UserResp = MsgBox("Record(s) have been added or changed." & vbCrLf & "Save the changes?", vbYesNoCancel)
Select Case UserResp
[Code] ....
The problem I'm having is when I press the 'Cancel' button in the message box. When I press 'Cancel' the form remains open (bPreventClose=True) which is what I want. But the changes to the data get undone even though I don't have Me.Undo in that case.
First, what's causing the undo?
Second, how do I prevent the data from undoing when I press 'Cancel.'
I went to add a record earlier and selected 'Cancel' because I wanted to change one small item. I lost all the data I had put in and had to start over.
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Oct 15, 2013
How to prevent duplicates on the combination of two fields - text & numeric?
I'm currently using the code below that warns users when the combination of two fields have already been used. (Combination of the TWO fields has to always be unique so if used again will warn the user)
Works well when both fields are numeric but fails when the JobDetails field is changed to text in the main table (tblPPMPLanner)
Code:
Option Compare Database
Option Explicit
Private Function IsDuplicateRecord() As Boolean
On Error Resume Next
Dim PreviousRecordID As Long
IsDuplicateRecord = False
[Code] ....
The field that should be a text field is called "JobDetails"
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May 29, 2014
In my simple database (attached), I need to mass duplicate Tasks and their Notes.
I have three tables: tbTasks (PK: Task_ID), tbNotes (PK: Note_ID), jtbTaskNotes (FKs: Task_ID and Note_ID). jtbTaskNotes is my many-to-many junction table that ties Tasks to Notes.
The main form (fmTasks), bound to tbTasks, has a subform (sbfm_TaskNotes) that displays notes associated with each Task. On themain form,you select which Tasks you want duplicated via a checkbox. The append query (quCopyTasks) will duplicate all tasks that have the checkbox checked. All good there. However, I can't figure out how to also duplicate each task's Notes.
I found Allen Browne's solution [URL] ....., but that only handles duplication of one record at a time, whereas I need to duplicate many records at a time (sometimes 10+ records). How do I go about duplicating multiple Tasks and their associated Notes?
Before you ask "why are you duplicating records?": There are times when tasks need to be re-accomplished and therefore need to have a new record. It's easier to duplicate records than it is to hand-jam everything again.
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