Modules & VBA :: Prevent A Duplicate Record Using DCount
Jun 15, 2014
If expression to determine if a duplicate records has been entered.
DateAte is a date
MealType is a list box (text)
All I want to do is prevent two lunches, etc. from being entered on the same date. Code that results in the message box every time, regardless if a duplicate record or not.
Private Sub MealType_AfterUpdate()
Dim strDA As String
Dim DA As Date
DA = Me.DateAte.Value
strDA = "[DateAte]=" & "#" & DA & "#"
If DCount("[MealType]", "tblmeals", strDA) > 1 Then
[code]....
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Mar 11, 2006
Hi All,
I have a recored set and i dont want a duplicate of the record set in the same table.
Say if my table name is businessskills and contains three fields(columns) and their names(Email , B_code, Rating) highlighted in red with data are as below
Email B_code Rating
hugh@hp.com b001 1
hugh@hp.com b002 3
hugh@hp.com b005 2
ston@hp.com b002 3
ston@hp.com b007 3
I have 5 recordsets in my table as shown above and i want to prevent any e duplicates.
Is this possible to implement to with excel vba code or directly in Access Database, either ways is fine with me.
Can any one please help me with this.
Thanks in advance
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Jun 18, 2015
I have a tblManualRewardIncident in there I have 3 fields I want to have my staff in put these rewards via a frmRewardIncidentEntry However im concerned over another staff member in putting the same data so I want the form to highlight on update that a duplicate is there already so cancel the data entry.
The 3 fields that need to check and match are StrataID , DateOfIncident , EndDateOfIncident these are all in the tblManualRewardIncident and appear as buttons in the form frmRewardIncidentEntry the buttons are as follows
cboStrataID , txtDateOfIncident , txtEndDateOfIncident
I want the VBA to run when I CLICK another button on same form cboSQCDP..All 3 fields must match exactly to flag a issue.
StrataID , DateOfIncident , EndDateOfIncident from tblManualRewardIncident
If it doesn't find a match continue and add the inputs in these boxes to the table if it finds a match flag a message and delete the data from the form.
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Dec 25, 2014
I currently assign multiple 'skills' to departments using a listbox and a combo using the following code
Code:
Private Sub cmdSaveReq_Click()
Dim strSQL As String
Dim db As DAO.Database
Dim rs As DAO.Recordset
[Code]....
However as time goes on we may want to add new skills to the depts - ive used dcount to check if the data exists in one field before however how would it be possible to check to see if the data combination exists over deptid and skill
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Jul 26, 2014
I've a Sub form as datasheet view/grid.
See Capture1 & Capture2.
I'd like to prevent for duplicate time/date for same GuideCode. How can i prevent for those during the entry time or save time ? Is it possible ?
Capture1.
Capture2.
1. AUNKZ(GuideCode) is already assigned in other file number(12345) for 03-Aug-14 (as 02-Aug-14 to 04-Aug-14).
2. TOD(GuideCode) is already assigned in same file number(23456) for 10-Aug-14, 12:00 PM (as 10-Aug-14 to 10-Aug-14, 8:00AM to 1:00PM). I'd like to prevent if the file number are same or not same.
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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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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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May 31, 2014
How can I prevent duplicate records from being added from a form, the dcount in the text field property, trigged before update is where this should be used is what I know but having trouble with the syntax.
I've got the table tblInvnetoryDetail with InvID(AutoNumber), and SerialNumber. The form text field is txtSerialNumber. I've managed this far with the expression
DCount([InvID],"tblinventoryDetail","[txtSerialNumber]=&"'") but this did not work.
How can I get the expression to avoid duplicates.
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Jul 17, 2014
I am trying to check if a record exists, but I keep getting a error!!!
Private Sub Command10_Click()
If DCount("*", "tbl", "[ID] = "") <> 0 Then
MsgBox "This record already exists.
Else
stDocName1 = "McrAddNewRecord"
DoCmd.RunMacro stDocName1
End If
End Sub
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May 11, 2015
Nutshell: My user DB has one menu with 4 tabs (2 for adding records, and 2 for searching/editing records). Since the form opens up in the acFormAdd mode, Access already creates a new record (blank) before they type anything. It is resulting in blank false new records that are getting added to the table and they are getting annoying. My audit table is full of "user X created new record at this time" when it's just a blank record.
There must be a way to prevent this using VBA, but I cannot find it.
I've seen ways to disable "add new record" buttons and such, but nothing that disables Access from being smarter than me and creating a new record before I decide to.
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Oct 25, 2006
I've set up a booking system and am looking to stop the system recording double bookings.
I've 3 fields, RoomID, Date and Time that need to be searched, however I can't just simply set the properties to No Duplicates (as this would mean a booking cannot be made on the same day at 9:00 and 12:00 for example).
How can I do this?
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Jan 13, 2007
i am using a textbox in the main form to transfer the Yr/Mth into the table. (refer to qp.zip)
now my problem is, how do i prevent duplicate records into the table?
e.g: currently whenever i scroll ard the months control in the form, i will get duplicate Mth/Yr into the table. how do i prevent that from happening?
i only want to have updated data inside the Mth/Yr table instead of duplicated Mth/Yr
Public Sub PutInMonthlyRecords()
Dim sql As String
Dim Db As DAO.Database
Dim rs As DAO.Recordset
Dim f As Form
Dim MthYr As String
Set f = Forms!frmQpi
MthYr = f("txtMthYr")
sql = "SELECT * FROM [tblQpiMonthly] WHERE (([tblQpiMonthly].[Input MthYr] = 'MthYr' ));"
Set Db = CurrentDb()
Set rs = Db.OpenRecordset(sql)
If rs.RecordCount = 0 Then
If (f!txtTotalPF) = 0 Then
Exit Sub
End If
rs.AddNew
rs![Input MthYr] = f("txtMthYr")
rs![Monthly TotalPF] = f("txtTotalPF")
rs![Monthly Rejection] = f("txtTotalAvoid")
rs![Monthly TotalAvoid] = f("txtRejection")
rs.Update
Else
If (f!txtTotalPF) = 0 Then
rs.Delete
Exit Sub
End If
rs.Delete
rs.AddNew
rs![Input MthYr] = f("txtMthYr")
rs![Monthly TotalPF] = f("txtTotalPF")
rs![Monthly Rejection] = f("txtTotalAvoid")
rs![Monthly TotalAvoid] = f("txtRejection")
rs.Update
End If
Db.Close
End Sub
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Feb 28, 2005
Have read through all the threads related to this topic and can't find anything to help. Just want a message box to pop up after entry of first and last names in a form if the string already exists in the database. DLookup works wonderfully for validating on one field, but adding the second field is driving me crazy - Can I use DLookup to check more than one field? The following code gives me the error: "Run time error '2001' - You canceled the previous operation."
Private Sub LastName_AfterUpdate()
Dim x As Variant
x = DLookup("[txtLastName]", "[tblVolunteerInfo]", "[txtLast Name]= '" & Me![LastName] & "'" & " And " & "[txtFirstName] = " & Me![FirstName])
On Error GoTo CustID_Err
If Not IsNull(x) Then
Beep
MsgBox "This name already exists in the database. Please check that you are not entering a duplicate person before continuing.", vbOKOnly, "Duplicate Value"
Cancel = True
End If
CustID_Exit:
Exit Sub
CustID_Err:
MsgBox Error$
Resume CustID_Exit
End Sub
thanks,
lkwander
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Apr 17, 2008
I am using a data entry form to enter new data into one of the tables.How can we prevent entry of duplicate records? Duplicacy shall be checked on the first two fields only.
Please help.
regards
bijon
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Mar 23, 2005
I have a form that contains 5 fields and want to ensure that duplicate information is not entered. I am aware that when creating the form you can set Duplicate Records to No but each record has an AutoID which I assume means that even if the information is the same it will not register as a duplicate record due to the different AutoID.
There should only ever be 5 records entered per day. One for each region
I have created a Sanity Check that is displayed as a sub form that shows if the relevant information has been entered for a given day in Bookings and Backlog but this doesn't stop the user from putting in the same information twice. i.e. the User starts inputting the information gets called away and then trys to put it in again but doesn't check the sub form.
The Table in which the information is stored is called Bookings and Backlog.
The 5 fields on the form which is called Bookings and backlog are
ID (Autonumber)
Date (Short Date)
Combo26 (Text) (5 Regions:- North, South, East, West, Central)
Bookings (Number)
Backlog (Number)
I have put the following statement in AfterUpdate on the Combo26 field
If Me.Date = DLookup("[Bookings and backlog]![Date]", "[Bookings and backlog]", "[Bookings and backlog]![Date]=[Date]") And Me.Region = DLookup("[Bookings and backlog]![Region]", "[Bookings and backlog]", "[Bookings and backlog]![Region]=[Combo26]") Then
'Define Message Box
MsgBox "The Region you have chosen already has data entered for this day." & vbCrLf & vbCrLf & "Please check your records and amend were neccessary.", vbCritical, "USER INPUT ERROR"
Else
End If
However I'm not to hot with writing VBA and probably got something wrong somewhere as it doesn't seem to do anything and lets the user progress regardless. I have tried amending the above script and asked it to look at just one field but this just seems to give the message regardless of the information selected in the Combo box.
Can someone give me an indication as to what I have done wrong so I can put it right and in a language that is easy to understand so that if I have a similar issue later on I don't need to post another question.
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Jul 5, 2006
Hi,
I have searched through the whole posts but could not find my query. I have a question related to prevent duplicate data entry in a form field.
I have a Form with 5 fileds on it: SNO, NAME, ROLL NO, CLASS, SECTION.
in the table design i have set the option of NO DUPLICATES on SNO(Autonumber) ROLL NO (text).
I wish to stop a user entering duplicate data in ROLL NO field before he reaches at the last field. What i meant is as soon as a user enters data in ROLL No field, it should check in table if the same data is already there. If the same data is found then it should give a message to prompt user of duplicate data, else it should continue to next field.
I have searched the whole forum but in vain. I am positive that there must be some one who holds the key to this solution.
Regards,
Darno
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Dec 1, 2006
Hi all: I currently have a database with a list of clients, and it is to be accessible to others to enter information on clients and to add new ones. However, I want to make it so that the user who wants to add a client can easily search the database for that particular client so that they won't enter a duplicate.
I have created a search function on my form, but then it occurred to me: what if there are two people with the same last name's? At first, I wanted a search operation to display a list of client names, along with their respective ID numbers and possibly a link next to each that would take the user to the corresponding record.
However, I have no idea how to do this, and I'm unsure as to whether or not this is the best way to tackle the problem. Please, someone show me the way!
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Aug 11, 2015
I am putting the student names in a form. I want it to alert me that a name is duplicated. But thats not this simple. For example a name is Jennifer Locus but I type jenifer with one . Can access guess that this might be the same person and suggest me to correct the spelling or enter it as a new person?
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Oct 16, 2013
the proper code to prevent duplicate records in my form?
I'm using:
Private Sub Ctl_Lname_BeforeUpdate(Cancel As Integer)
Dim dupCount As Long
dupCount = DCount("*", "Clients", "[LastName]= '" & Me.[LastName] & "'" & " And " & "[PreferredName] = '" & Me.[PreferredName] & "'")
If dupCount <> 0 Then
Beep
MsgBox
[code]....
"This name already exists in the database. Please check that you are not entering a duplicate person before continuing.", vbOKOnly,
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Apr 25, 2013
I just need a simple method to prevent a member being imput twice on a form.
I have two fields firstname and surname ( this is necessary).
I want to stop duplication of the same person being entered when staff use the form.
How do I stop this?
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Jan 27, 2014
I am trying to prevent a user entering duplicates of date and time in an appointments table for the same doctor..how do I do this?
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Nov 12, 2013
Im trying to prevent duplicate records based on a PO # (RA_PO_Nbr), entered from a form. I'm trying to throw a 3022 error when the user attempts to enter a record that already exists, but I dont necessarily have to do it this way.
Code:
Private Sub cmdSubmit_Click()
On Error GoTo cmdSubmit_Click_Error
Dim db As Database
Dim rst As DAO.Recordset
Dim strSQL As String
strSQL = "CompanyPOTable"
[code]....
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May 14, 2015
I don't want to allow more than one instance of (HolDte) for the same EmployeeID
PHP Code:
If DLookup("[HolDte]", "tblHour", "[EmployeeID]='" & Me.EmployeeID.Value & "'") <> Me.HolDte.Value Then
Exit Sub
End If
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Oct 22, 2014
I have a mainform (F_main) and a subform associated (F_place).
F_place is the form of the table T_place.
T_place is linked to F_main by the field "BizNumber". I also have the field "Place" and of course the "Place ID" (primary key) in T_place.
"Place" in linked to a combobox (in F_place).I want to avoid, at a given "BizNumber", the same "place" to be entered in the F_place.
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Jan 9, 2013
I have tblWO_Points and column with firstname and lastname and dateWO column. What code do I use to prevent duplicate dates for same firstname and lastname? Also if a date is a duplicate that it wil ask if you want to go to that record?
Example:
Jane Doe Wednesday, January 07, 2012
Jane Doe Tuesday, January 06, 2012
Mike Doe Wednesday, January 07, 2012
Mike Doe Tuesday, January 06, 2012
Mike Doe Thursday, January 12, 2012
So the same dates can occur for different people but the same dates cannot be recorded for the same person.
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May 3, 2013
I have a table for storing vehicles. The table contains the following fields:
VehicleID
Make
Model
Trim
Build Date Begin
Build Date End
Vehicle Name - a concatenation of 'Make' 'Model' 'Trim' 'Build Date Begin' and 'Build Date End'
The 'Vehicle ID' is the primary key, the rest of the fields can't be indexed with no duplicates. Is there a way of preventing one from saving a duplicate VehicleName on the table since it is a calculated field.
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