Check If Record Exists In Table

Feb 6, 2013

I am trying to check if a record exists in a table.

Dim cert As String
Dim existingRec As Variant
existingRec = DLookup("[Certificate]", "[Fire]", "'cert' = 'cert'")
If existingRec = Null Then

Else
MsgBox "The Certificate " & existingRec & " is in the database"
End If

Note - Certificate is a column in the table "Fire"

Problem is that existingRec only finds the first value in the Certificate column, How do I get to check the entire Certificate column?

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Check Query To See If Record Exists

Dec 4, 2006

Hello all,
I have a form that looks at my "master table" where users put in general info about a sheet of material.
There are two combo boxes on this form, Batch# and Lot#. They will use the same Batch# and Lot# for many sheets. Every time a new batch and lot are entered, this will bring up a pop-up form where the user needs to take a measurement of that batch and lot for QA. This will go into a different table, where the batch and lot #'s are unique(many of the same batch#'s with different Lot#'s).
After the lot# is entered, I want to run a query in VB that looks for those unique identifiers, and if it doesn't find a record, my pop-up form will run.
This is probably something very easy....... It was a very long weekend and I'm tired of thinking.

Thanks
Scott

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Feb 29, 2008

Hey all,

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For a couple of days now I've been trying to devise a way to achieve what I want, but I just keep going in circles and hitting errors (thanks to forum members, I've been able to solve most of them.) So, here's what I want to be able to do:

Input a product using the iproduct combo box (which gets its list of values from the Products table); its brand, using the ibrand combo box; and its size using the isize textbox, all in the frmFoodSub form. I then want it to check to see if an exact record already exists (ie. the same product, same brand, same size.)

If it doesn't exist, I want to create it. If it does, I want to do nothing. Then I want the product - either the one I just created, or from a record that already exists matching the iProduct input - to be input into the product field of the PurchaseDetails table. I then want to use iQuantity and iPrice textboxs, already linked to the PurchaseDetails table, to input the newly added product's quantity and price.

I hope my explanation was clear enough. I'd appreciate any help with this you may be able to offer.

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Jan 2, 2014

I have created a form which enbles users to enter data into the fields which will add a new record to my table. What I am trying to do now is to create some kind of validation rule that will check whether the record already exists.

I need it to work this way; there are four input fields- 3 text and 1 is a date filed. When the user enters a new record they are not allowed to create a record that conatins the same combination of values. So if one record has for example filed 1 = 1 field 2 = abc field 3 = def; then no other record can have the same combination of values.

If the user enters an already existing combination there would be an error message saying which field is incorrect. If the combination doesn't exist it would add the record and display a message that the record was successfully added.

How can I do this?

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Sep 10, 2014

I have a form, which has a combo box which a user can select an employee - the combo has three columns (Employee_Number, Surname, Initials) although the Employee_Number column is set at a 0 width, so not visible.

The form is bound to a query which only shows records that are 'Active'

When a user selects and employee in the combo box, I want the AfterUpdate event to check and see if there is already an active record - if there is, throw up an error message and then reveal a couple of buttons giving choices what to do next; if there isn't an active record, reveal three textboxes and then populate those textboxes with the values from the three columns from the combo.

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Here is the section of code that I am battling with:

Code:
Dim EmpNo As String
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Aug 19, 2014

I currently use

Code:
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Oct 29, 2013

I have a database that involves a lot of data about ppl and I'd like to prevent duplicate entries.

I have a form that gathers data. I'd like to have a button after name, surname and birthday are written.

A click on the button would display a msgbox that says that person already exist, maybe even with the added - edit the old entry/add new record anyway/abort options.

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Jul 2, 2014

The problem I have is, that I need to insert an apointment into de database but first I need to verify if there is a record or an apointment in that room that day the same hour, if that is so send a msgbox saying an apointment already exist in that room this day at this hour.

i tried using dlookup but it only works in one record using just one criteria

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May 27, 2014

I have a table in Access that I have a form saving new records to. Before this save occurs, I would like Access to check if the account number already exists and if the account does exist if it is outstanding. If both of those conditions are met I would like a message box to display and cancel the save as it is a duplicate. I can't seem to get it to work though.

I was thinking to use a filtered recordset based on one of the conditions and then perform a find on that recordset to see if it is null.

Code:

dim acct as long
dim rstfiltered as DAO.Recordset
Set rstfiltered = CurrentDb.OpenRecordset("SELECT * FROM tblclstrack WHERE [Request Status] <> 'Completed'")
acct = Me.cd_number.Value

[code]...

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Check If Value In Table Already Exists

Nov 20, 2006

Hi

I have a problem where a user would enter a project code eg 113-099. I put in a list box that filters all the project codes for instance if the user enters 1 it will show all codes starting with a 1 and every additional number they enter it filters the list box to show which codes already exists! I hope this makes sense.

The problem i have is i need to check when they enter the project code that it is a unique value. The Database developer we got in didnt index this field as no duplicates allowed and as result we have large amount of duplicate project codes.

I have started to experiment with Dlookup but with no great success.

If anyone can help it would be much appreciated as i dont have much experience with access.

The field name on the form is

[forms]![projects_frm].[project_job_number] and the table which stores this information is [projects]

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Aug 12, 2012

Is there any way to check if a particular table already exist in MS Access Database using ACCESS VBA?

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Code:
If .DCount("[Name]", "MSysObjects", "Left([Name],1) <> '~' AND [Type] = 5 AND [Name] = '" & strTempQueryName & "' ") <> 0 Then
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The file can be in one of three states.File exists with data.

File exists, but is empty.

File doesn't exist.

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Jan 7, 2013

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Hi,

In the current db there are some tables and queries, forms designed around them

With one table Test
http://members.optusnet.com.au/~lukechang/access/table_d.JPG

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http://members.optusnet.com.au/~lukechang/access/table.JPG

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http://members.optusnet.com.au/~lukechang/access/form.JPG

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A
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[code]...

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I am trying to achieve the following - I want to query a table to see if a record exists with a particular field blank. If so, I would like to prompt the user for data.

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Jul 19, 2006

Hi, I have the following problem which I hope someone can help me with:

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Mar 21, 2013

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Sep 9, 2014

I have the following vba to check if a table exists, but I can not find on the net how to check if a form exists, I tried to modify this script but there does not seem to be a formdef

Code:

Sub table_Exists()
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Dim dbsExist As Object
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tablename = "Table2" ' Your Table Name
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[code]....

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Jul 20, 2005

Hi there

I recently have been given a database to get into shape.

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Let me try explain.

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How can I make a piece of code that once the booking number textbox loses its focus the code then checks the table to see if that booking number exists. I would like for the person to establish that they need to enter a new booking number before getting to the end before seeing that the booking number already exists.

I hope I am making some sense.


TIA

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Oct 27, 2005

hey guys

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anyway. in access i want it to pick the newer of the two files (i assume this is using a fso system object?), if the one it normally doesnt use is newer, it should copy the new one over the old one and continue using the one it normally uses.

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Private Sub Command0_Click()
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Dim strcNewPath As String

strcNewPath = "O:QA FilesQC ReportingMovedFiles" & Format(Now, "yyyy-mm-dd h-mm-ss") _
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[Code] .....

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