Remove Duplicate Entries
Mar 8, 2007
I am using information pulled from a separate database to create a new database for mail merger purposes. I have created delete queries that go out and delete specific records from the new database to help us get the proper list before setting up the mail merge. However, now I am stuck. We have customers that have multiple accounts with us that are qualified for this mailing, yet each customer needs to receive only one mailing.
The table looks like this essentially.
Table 1
id statCode acct custNumber* addy-etc.
*This is the field in which we can find exact duplicates. What I need to do is remove the duplicate entries and leave at least one of the entries within the table. It does in fact need to remove the whole record, but as I said leave at least one of the records behind.
Can someone please help me to find a solution to this.
I guess I should add that I am not very good with Access and I use it very sparingly.
I assume that the above can be accomplished using a SQL statement.
Any help will be greatly appreciated.
LR
**EDIT** I also needed to add that I do need to exclude 000 00 0000 from being removed because of duplication.
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May 19, 2007
Hi all,
I have imported a table from Excel. The table contains a long list of names and there are quite a lot of duplicates.
How do I remove the duplicates so I can import the clean list into a value list in Access ?
Thanks in advance !
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Oct 27, 2013
I am attempting to filter the data in query design such that it will not return anyone in the database has there name present more than one time.
For example, in the image below under the Owner_Name field there is "Abbot, Mark C Etux Wanda C". This name appears twice in the database. My criteria is the name can only appear once, therefore this record would not be returned after the query. In query design I would like it to return only name records that appear once in the entire database if there is a way to structure that.
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Oct 3, 2013
I have two tables in my Access database. Table 1 has three columns, First Name, Last Name and Phone Number. Table 2 has just 2 columns, First Name and Last Name. What I would like to do is write a VBA macro to consolidate Table 2 into Table 1 and insure any duplicate First Name-Last Name combination is removed.
Table1
Code:
F.Name L.Name Tel.N.
John Smith 12345
Larry Miller 12344
Tony Woods 12333
Table2
Code:
F.Name L.Name
Albert Black
Larry Miller
John Bush
Table1 Post-Macro
Code:
F.Name L.Name Tel.N.
John Smith 12345
Larry Miller 12344
Tony Woods 12333
Albert Black
John Bush
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Jun 11, 2013
I have a table called Stock Levels which contains 3 fields. (ID, ProductID, StockLevel) ID is the Pkey, ProductID contains duplicates and StockLevel which contains different stock levels
and I am trying to remove the duplicates and retain the the data so I am left with the correct stock number
what I have done is the following, but I am still getting duplicate values in productid and stocklevels
SELECT DISTINCTROW id, productid, stocklevel into mynewtable from stocklevels
I have attached a screenshot of the table
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Mar 30, 2006
hello,
Currently i have a database that holds information about computers. Each computer has a Service tag and is associated to a person. I need to be able to prevent duplicate service tags from being entered. I am using indexing and don't allow duplicates from the table design view. But, if a duplicate service tag is indeed entered, i want to inform the user who that service tag currently belongs too without having to search through the DB manually. I need then to give the user the option to delete the duplicated record they just entered or change the service tag that they just entered. Thanks.
Jared
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May 1, 2007
Can anyone suggest a way to remove duplicate records.
I've come up with this:
SELECT *, count(*) cnt FROM tableName GROUP BY fieldname1, fieldname2, .... HAVING cnt > 1
But this does not fully resolve my problem.
Thanks.
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Feb 6, 2008
Hi,
I need to remove all duplicate records in a table. These are records that have matching Contract and Order fields. I can't do a DISTINCT query, because that still leaves one record. Thanks.
Michael
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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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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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Oct 12, 2006
I am running a query to find out duplicate in two fields in one table. Postcode and Address Line 1. Can anyone tell me the formula for only picking up the first 6 charaters in the Address Line 1 field??? I cant remember how to do it!
HELP!
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Jul 30, 2007
Is there a way to find and remove duplicate entries in tables by using queries.....if so, how specifically?
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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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Oct 17, 2006
I have a booking form database
With a date field.
I want users to be warned when they try to enter a date that already exists in the database in order to avoid double booking:confused: .....
all suggestions appreciated:)
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Dec 28, 2006
Hello,
I'm new to using VBA for MS Access. May I enlist your help, Please.
I'm working on a human resources database for a group of employees. I'm trying to automate their login process after they have opened the database so that each employee's privacy is respected. Using an initial form, employees are separated into "New User" or "Returning User". My problem concerns setting up the "New User" in the database.
The New User is directed to form "frm_NU". The form has several unbound fields which are later carried to the table "tbl_Employees". Two of the fields on the form are used to create the EmployeeID. Those are Initials [INI] and Phone Extension [EXT]. The EmployeeID will be used in a filter so that only that employee's information is made available to the user (simulated Privacy).
Because the employees are unfamiliar with MS Access and its cryptic error messages, I need to create a message box which will give a plain English warning when a user attempts to use an existing ID to create a new record. [EmployeeID] is a field in the table. it is set as a key and does not allow duplicates.
When a new user enters his/her initials and phone extension I want the new ID to be compared to the table and if found, a message should appear. This is a preemptive strike to prevent the user from getting to the more cryptic MS Access error message.
I've tried using Dlookup and Dcount to try to pass some meaningful data to the If statement variable VarX to trigger the message box; assuming that Varx should be something other than Null or Empty
Dim EmpID As Variant
Dim VarX As Variant
EmpID = [INI] & [EXT]
VarX = DLookup([EmployeeID], "qry_Employees", [EmployeeID] = [EmpID])
If VarX <Is Not Empty> Then
X = MsgBox("Another record already exists by that name", vbOKOnly)
Else
Y = MsgBox("Passed", vbOKOnly)
End If
I keep getting an error at the DLookup formula or DCount formula saying: Run-time error; 2001 You canceled the previous operation. It also appears that the DLookup never looks up anything nor does DCount count anything even though I'm purposely entering duplicate information which exists in "qry_Employees". I was expecting VarX to be either the duplicate ID or a record number or record count or something.
Any ideas or constructive suggestions?
Thanks,
Goh
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Sep 10, 2004
hey,
sorry to bother everyone again, this is such a great forum, and ive gotten soo much help here.
i have a customer table, containing custRef, custName, drawerRef, Address, Phone, Fax
now it contains site addresses so the custName can be the same for quite a number of entries. no the combo box in my form obviously shows all entries for custName which means the same name repeated sometimes 6 or 7 times, as i only need to select one, is there a way without looking to different tables etc to just show unique entries. i dont want to list them all in another table because i dont know them all yet, so i want it to lookup the list as i enter them.
cheers
Baz
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Aug 6, 2006
Hi,
I have a rather large database that was built in Access '97 and recently converted to 2003. I have a couple problems now. I get an error message about not being able to update the form because it would create a duplicate value in the primary key, index, or relationship. (Error 3022) I didn't build this particular database so I'm not totally sure why somethings are done the way they are. I've spent a long time going through everything to try to understand the relationships and I've asked lots of people at work to look at it, but no one seems to understand why it's doing what it's doing. The Access Help information has helped me understand some things better, but not this problem. I've gone through every table and removed all primary keys and set all indexes to allow duplicates. Then, when I was looking at the relationships and object dependancies, I think everything looks to be in order. However, when i add info directly to the table instead of using the form, the form is not updated with the new info. the table keeps the information, but isn't communicating with the form and i suspect reverse is true which is where the error is coming from. But how do I detect that for sure and how can I fix it with out starting over? I've gone through and added data to one field in the form at a time to try and narrow down what field is causing the problem, but no matter what i get the same error. Is there a way to find out exactly what field is causing the error? Thanks for any help you can offer!
Alicia
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Jan 8, 2007
Hi everyone,
I'm aware of the wizard in MS Access that creates a new table containing duplicated entries that have been entered under one column, however, my problem is slightly more complex...
A contractor of mine has recorded information from CCTV surveys of sewers (not very glamorous I know!) in a Microsoft Access database. If you can imagine - the camera can be pushed along a pipe from both ends. Sometimes, the survey is abandoned in one direction and then repeated along the same length of pipe but from the other direction. The database contains (amongst other columns) a "start manhole" reference and a "end manhole" reference.
eg:
16014
As you can see, the information contained by both entries will be the same (as they are the same length of pipe). Therefore, I was wondering how I could get MS Access to:
1. Recognise these 2 entries as duplicates
2. Create a table that hides the duplicated entry with a shorter "SectionLength" value.
Many thanks in advance.
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Aug 29, 2007
I'm using a pretty simple inner join on two tables but the some of the same results are showing up twice. If I just remove the inner join all the results are uniquely present. For some reason the inner join creates about 10% more records that are all duplicate entries. Any idea what might cause this? :confused:SELECT products.product_nameFROM products INNER JOIN categories ON products.category = categories.category_nameWHERE ((products.X)=True);
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Aug 17, 2005
Hello
I am trying to get a 2nd combo working from the first .
I have a table called Keystage (tblKeystage) and I have also named my 1st combo cboKeystage. then by following the vba below I created another 6 tables with corresponding names and combo's.
Private Sub cboKeystage_AfterUpdate()
On Error Resume Next
Select Case cboKeystage.Value
Case "Foundation"
cboYear.RowSource = "tblFoundation"
Case "KS1"
cboYear.RowSource = "tblKSOne"
Case "KS2"
cboYear.RowSource = "tblKSTwo"
Case "KS3"
cboYear.RowSource = "tblKSThree"
Case "KS4"
cboYear.RowSource = "tblKSFour"
Case "Post16"
cboYear.RowSource = "tblPost"
End Select
End Sub
The combo boxes both work, brilliant. My problem is that when I enter another record and make a selection from the 1st combo box, it changes all the records.
Could somebody please help.
Thanks
Wong
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Aug 16, 2007
I have a table that contains doctor information including their license number. This came from a worksheet that tracked referrals from last season. I need a query that will show me only those record that have a unique MD License number. In other words I only need to see the 5-600 doctors out of the 2420 referrals in the table. Once I get the query of unique MD's I can create a report for the salesmen to use to contact them for the upcoming year.
I know this is probably simple but I can't find the solution.
Thanks in advance.
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Jun 25, 2014
I'm trying to use access to identify how many times an indiviual appears in my database. I've got a large file which gives me all referrals, each referral comes with two identifiers, one unique to the person, another unique to the referral. This means that the person unique number may be repeated multiple times (if a person has more than one referral) but the referral number would be different each time.
I've run a query to identify the duplicates, i.e. the records where the person unique identifier is repeated. What I am trying to do is work out now how many people have been referred twice, how many three times etc. The original query looks something like this (but on a much bigger scale).
Person Referral
1 A
1 B
1 C
2 D
2 E
3 F
3 G
3 H
What I'm after is a query that will tell me that two people were referred three times (1 and 3) and that one was referred twice (2) and so on.
I'm on Access 2010 if it makes any difference.
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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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Apr 21, 2013
I've got a combo box that lists duplicates. I want the dupes removed.
I went to the Query Builder for my Combo Box and set Unique Values from "No" to "Yes" - Saved, then re-opened the form. It still lists dupes.
I went back into Query Builder and unchecked the box for the Patient_ID (Autonumber) field. I saved it, then viewed the Datasheet for the Query, and it correctly lists the data I want WITHOUT dupes.
However, when I go to Form View, the combo box lists several blank entries..
The entries come back when I re-enable the Autonumber field in the Query.
This is what I currently have...
SELECT DISTINCT Patients.FullName FROM Patients ORDER BY Patients.FullName;
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Feb 10, 2014
I am using Access 2007, and I mistakenly created a duplicate table in Relationships. And, I have not been able to removed it or delete it.
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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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