Duplicate Check

May 2, 2005

I have a form with a couple fields. i want to check to see if i have a duplictae field. the field is batch_ID. so if somoen tries to enter a batch_id thats already in the table a message box will popup saying duplicate record and it will take me to that record ?


Could i have an example please.

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Check If Duplicate Afterupdate

Nov 30, 2006

Hi, I was wondering if anyone knows the VB to check if a value is a duplicate afterupdate?

Many thanks.

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Jul 28, 2005

Hi folks,
I have this situation: a table with patients information and IDs, and a table with evaluations for those patients (identified by ID).
I am trying to make it so that the user can't add the same evaluation twice. I want to do it by checking if there is already an evaluation for that patient with the same date.
I know how to show evaluations only for a patient, but I don't know how to check if the value entered by the user in the date field is a duplicate (case in which he shouldn't be allowed to enter it). I assume this is done somehow through the "validation rule" property? But how should the expression be?
Thanks a lot!

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Check For Duplicate Record By 2 Fields

Mar 12, 2007

dear all

i managed to get checking for duplicate record by ONE field ie member_no

code :

If DCount("*", "runner", "member_no = " & Me.member_no) > 1 Then
MsgBox " This member is already exist!" & vbCrLf
Me.c_memberid.SetFocus
Else
DoCmd.CancelEvent
End If


how i want to get checking duplicate record by TWO fields ie member_no and run_no ?


thanks in advance

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Nov 29, 2006

I have a form - see attached image.
The first text box is called Job_No. When a number is entered here how can I check that the number doesn't already exist when the user tabs to the next box. Then if it does exist display a custom message to the effect "This already exists" and not the Access default duplicate error message.

Thanks

Michael

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May 21, 2007

Hello All,

I have a database where a user imports data into a table monthly. She saves the Excel file and then clicks a button in Access to import the data. My instructions say to only click that button once, but so far, she has clicked it THREE TIMES, thus importing the data three times. How can I prevent this? Here is a copy of my import code:

Option Compare Database
Option Explicit

Public Function ImportTableData()
On Error GoTo ImportTableData_Err

Dim strPeriod1 As String
Dim strMM1 As String
Dim strYY1 As String
Dim strYYYY As String
Dim strFormName As String
Dim strMDPath As String
Dim strMDFileName As String
Dim strDCPath As String
Dim strDCFileName As String


'No Warnings
DoCmd.SetWarnings False

'Import Current Month data in a temporary table
DoCmd.OpenForm "frmEnterAgingDates", , , , acFormReadOnly, acHidden
strFormName = "Forms!frmEnterAgingDates"
strPeriod1 = Forms!frmEnterAgingDates.Period1.Value
strPeriod1 = Format(strPeriod1, "mmddyyyy")
strMM1 = Left(strPeriod1, 2)
strYY1 = Right(strPeriod1, 2)
strYYYY = Right(strPeriod1, 4)
strMDPath = "S:FinanceAccounting OperationsNational AccountsAccount Recs116405.100 and 117630.300116405.100-AR Due from PAR Plans NASCO"
strMDFileName = "MD AR Due from PAR Plans_" & strMM1 & strYY1 & ".xls"
strDCPath = "S:FinanceAccounting OperationsNational AccountsAccount Recs116405.100 and 117630.300117630.300-AR NASCO Refund Due from PAR Plans117630-2007"
strDCFileName = "DC AR Due from PAR Plans_" & strMM1 & strYY1 & ".xls"

DoCmd.TransferSpreadsheet , acSpreadsheetTypeExcel9, "tblData_temp", strMDPath & strMDFileName, True
DoCmd.TransferSpreadsheet , acSpreadsheetTypeExcel9, "tblData_temp", strDCPath & strDCFileName, True

'Append tblData_temp to tblData
DoCmd.OpenQuery "qryAppend_tblData_temp_to_tblData", acViewNormal, acEdit

'Delete any blank rows that may have resulted from the import
DoCmd.OpenQuery "qryDeleteBlankRows", acViewNormal, acEdit

'Delete the temporary table
DoCmd.OpenQuery "qryDelete_tblData_temp"

Beep
MsgBox "The file has been successfully imported", vbInformation, "Files Imported"

ImportTableData_Exit:
Exit Function

ImportTableData_Err:
MsgBox Error$
Resume ImportTableData_Exit


End Function

Thank you for your help!

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How Can I Check For Duplicate Entries After Leaving A Field?

Aug 30, 2005

I'm pretty new to Access, so please overlook any stupid questions :)
I have a data entry form that has one field that cannot be a duplicate. So, in the table I have it Indexed with No duplicates.
The problem is that the form doesn't notify the user that they have entered duplicate information until they close the form. So the 10 minutes they spent filling it out is wasted.
So, after consulting various posts, I did a BeforeUpdate event with the following code:
(the field that must be unique is called "LS Number", in the form "Q and D" based on the table "Q and D Database")


Private Sub LS_Number_BeforeUpdate(Cancel As Integer)
On Error GoTo LS_Number_BeforeUpdate_Err

If (DLookup("[LS Number]", "Q and D Database", "[LS Number]=Forms![Q and D]![LS Number]")) Then
MsgBox "The LS Number you entered already exists. Enter a unique LS Number", vbInformation, "Duplicate LS Number"

End If

LS_Number_BeforeUpdate_Exit:
Exit Sub

LS_Number_BeforeUpdate_Err:
MsgBox Error$
Resume LS_Number_BeforeUpdate_Exit

End Sub


When I test this by entering a duplicate LS Number, it gives me the error "Type Mismatch." Unfortunately, I have no idea what this means, nor do I know how to fix it.

Please help, my head hurts!

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If Statement To Check For Duplicate Entries With List Box

May 17, 2006

I have a problem where in a table called tblPatientLanguage
that contains three fields

PatientLanguageID
PatientID
LanguageID

a patient who is identified by PatientID can speak several languages
identified by the LanguageID.

The problem is with my current form and code


For Each varSelected In Me!lstLanguage.ItemsSelected
rs.AddNew
rs("PatientID") = [Forms]![frmPatientDemographics]![PatientID]
rs("LanguageID") = Me!lstLanguage.ItemData(varSelected)
rs.Update
Next varSelected



when the user click on the command button called cmdOK it will put the
data in the table "tblPatientLanguage" and corresponding fields. without
checking to see if there is already a duplicate languageID that corresponds to the
same patientID in the table

This has lead to duplicates in the table

example
PatientID = 9

if I look in the table I will see 7 entries that say

PatientID = 9 and LangaugeID = 7

I want to prevent this from happening with and if statement
I could make both the PatientID and LanguageID primary keys
this would prevent this from happening. But I would rather do it in
the VBA code? This way in will move thorugh the selections without poping an error and the person inputing the date. Any ideas sorry for being long winded. I attached the
database.

PS. If looking at the database you have to use form frmPatientDemographics and click on the language link

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Jan 9, 2014

I need to create a record of Users. I created a form with fields containing Username,FirstName,LastName & Email Address wherein the UserName is equals the value of the fields FirstName & LastName. I have a save command button and when I click it, I want it to be able to check if the new entry has a similar UserName that exists in the database, if it exists then it will allow me to edit the UserName and then save the data otherwise will allow me to save it.

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Dec 30, 2013

We are working on an Access (2007) database that is on a SharePoint Site (2007).

Currently the form is operational, but there is one last thing that would be nice to have.

The table is "Updated Headcount" which contains "EMP_ID" which are unique numbers stored as text.

In the event a new employee is entered in the system by another user on this site we would like to prevent any duplicate "EMPID"s from being entered and saved on the SharePoint, we would also like to alert the user and prevent the data from being saved.

All data is currently bound, so once the user makes a change it is made, no submit button is required.

We are running into some difficulties in doing a dlookup from the value entered and comparing to a column in the table.

TABLE - UPDATED HEADCOUNT
COLUMN in UPDATED HEADCOUNT - EMPID
FORM CELL user will input an EMPID - newEMPID
FORM CELL used for a dlookup to compare what user has entered to what is already in the table - duplicateEMPID

So below is what we are trying to do, we are sure there are a few commands missing....

=IIF(newEMPID=dlookup([UPDATED HEADCOUNT]![EMPID]), newEMPID, "Error, EMPID already exists")

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Mar 19, 2007

Long time lurker, first time poster.

I'm in need a of a check-in/check-out application for my company. We have about 550-600 employees at any given time and our turnover is about 20-30% per year. Our check-in/check-out process requires our employees to personally visit between 30-40 areas in our company (personnel, safety, credentials, parking, insurance, etc) within the first month of employment. This is currently done manually and is a huge drain on labor, especially when check-in sheets are lost, misplaced or, in some cases, forged.

I'm looking to build a database that would be intranet based, password secure (by check-in area) that would allow the new employee to present at a particular check-in, check-out site, complete that portion of the check-in/out process and then allow the person responsible for the check-in/out to enter the status into the database. At any point in the process, I would want to know the status of the person checking in/out (how long they've been checking in/out and what portion of the process have they completed).

Can this be done in ACCESS?

Thanks

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Apr 25, 2005

Hi
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Mar 11, 2007

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Thanks:)

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Feb 23, 2008

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Regards

Henry

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Mar 19, 2006

:confused:
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I have a vehicle table
I have a customer table
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Hi All,
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Feb 22, 2005

I have a form with a bunch of fields. Now their are three im concered with. CFR_EHPID,CFR_SVCDATE,CFR_PROVTAXID. If thier is a vaule in the database when the user tries to enter it again, i want a dup message to show...... SO i dont want any duplicates for those three feilds. is their a way when the user is done keying and tries to move to the next record it displays that thier is a duplicate??????. below is the code i use but its for the before update event



Dim SID As String
Dim stLinkCriteria As String
Dim rsc As DAO.Recordset
Set rsc = Me.RecordsetClone
SID = Me.CFR_EHPID.Value
stLinkCriteria = "[CFR_EHPID]=" & "'" & SID & "'"
'Check StudentDetails table for duplicate StudentNumber
If DCount("CFR_EHPID", "CFR", stLinkCriteria) > 0 Then

'Undo duplicate entry

'Message box warning of duplication
MsgBox "Warning Student Number " _
& SID & " has already been entered." _
& vbCr & vbCr & "You will now been taken to the record.", vbInformation _
, "Duplicate Information"
'Go to record of original Student Number

End If
Set rsc = Nothing
End Sub

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Sep 13, 2007

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Jul 5, 2005

pls can someone point me in the right direction

have searched through the forums.

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Jul 11, 2005

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Dec 2, 2005

So this is a very basic question, listen up:
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Feb 22, 2006

Hi,

I need to make a database which wont allow any double bookings.

I've got all my bookings in a query and when a new date is entered (via a new bookings form) I need to make sure that date entered doesn't already exist in the query. I have tried a DLookup but it didn't work, however that is more than likely to be a user error, heh.

I've jumped in at the deep end doing this database. I've only done a few step by step databases before hand and the Access Help has sometimes helped my problems but I just can't find the solution on my own for this, I need somebody elses help.

Thanks a lot

Forg

EDIT: sorry if this is in the wrong area, I couldnt think where to put it

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Feb 10, 2008

Hi I've just signed up to the forum.
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Dec 9, 2004

Hi, doing my project at college, decided to do a EPOS simulator for my sisters business based around barcodes etc and tied to a database. i've just knocked up something after normalising my data to prototype it to see if it is viable. I'm having problems with duplicate field entries. My db consists of essentially 4 tables at this point:

User : user ID, User Details

Product: Product ID, Barcode, Description, Cost Price, Sell Price

Transaction: Transaction Number, Date, User ID, Transaction Total

Transaction/Product - a compound key which is to manage the many to many that exists between Product and Transaction tables.

I am wanting to allow multiple entries for the same item, i.e. multiple scans, not a single sacn followed by a quantity. I keep getting an error message though that syas I am duplicating fields. I have tried altering the Index property for the fields in the Product/Transaction table but htis has had little effect.

Any thoughts please as to how to do this? I have attached the db for examination.

many thanks, Lol :D

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