Query To Find Duplicates
Jun 15, 2007
Hi,
Our Contacts database has around 4000 individual contacts (and growing), which have been pulled together from four or five seperately maintained databases. As such there are bound to be duplicate records.
What would be a good way of querying the database to find duplicate entries (i.e. entries where the first name and surname are the same)? Short of putting everything in alphabetical order and manually scanning them to see if there are two names the same next to each other I don't know of a way to do it. Also, the manually-scanning method won't work if the names are spelled a little differently (Davies and Davis).
Any ideas?
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Jun 6, 2007
hi all, im trying to make a query so that when someone updates a field in a form it searches a table (Companytable) which is a list of company names. If it exists i want it to then display a msgbox " already exists" sort of thing! trying to do this in the criteria field on the query. anyone have any ideas or useful resources, ive not done this for a while and cant remember much of IF THEN sort of stuff. mainly not sure if im barking up the right tree, i can search dependent on a set value but not sure how to do it dependant on whats been typed into a form..any pointers would be appreciated! thanks! James
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Jan 4, 2008
I know I have duplicate records in a table and therefore I used the "Find duplicates Query Wizard" to identify the duplicates.
I am positive - there are duplicates and the query does not perform the way it should be.
Any suggestion will be appreciated.
TKS
JLA
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Feb 12, 2008
Hi this is my first post... so hi all :)
ok what i have is a table with contact details 900k plus
there are about 90k of which are duplicates.
this is the basic feilds that are important in this case.
Id, data_source, data_recived, data_code,
what i want is to have a table with unique records (no dups in data_code)
this table will look like this...
Id, data_code, Num_dups, dup1_source, dup1_date, daysbtw_Dup1_dup2, dup2_source, dup2_date, daysbtw_Dup2_dup3 ,dup3_source, dup3_date, daysbtw_Dup3_dup4 ,dup4_source, dup4_date,
I know there is no more than 4 dups of each record.
what i want from this is a table that will give me a record of how many dups for each record then all the dates that they were added and the date between each record entry.
if anyone can help it would be great .
thanks in advance.
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Oct 23, 2014
I have a find duplicates query with the following SQL:
Code:
SELECT tblData.Vendor, tblData.[Loccurramount EUE], tblData.Last4, tblData.ID, tblData.Line, tblData.CoCd, tblData.[Document record number], tblData.PurchDoc, tblData.Reference, tblData.Curr, tblData.[Entry dte], tblData.Status, tblData.Version, tblData.Outcome
FROM tblData
WHERE (((tblData.Vendor) In (SELECT [Vendor] FROM [tblData] As Tmp GROUP BY [Vendor],[Loccurramount EUE],[Last4] HAVING Count(*)>1 And [Loccurramount EUE] = [tblData].[Loccurramount EUE] And [Last4] = [tblData].[Last4])))
ORDER BY tblData.Vendor, tblData.[Loccurramount EUE], tblData.Last4;
This works fine however I want to add another clause to the WHERE and I'm not sure how. At the moment the query highlights duplicates where the Vendor, Loccurramount EUE and Last4 match. I want to further restrict it so that it only finds duplicates where the Vendor, Loccurramount EUE and Last4 match BUT the number shown in version Does Not Match
So if two records have the same details for Vendor, Loccurramount EUE and Last4 and also have the same Version number then they don't show in the result.
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Apr 24, 2013
Employees submit information into a form which translates the information into a table. The table has been in use for years. By accident some employees were writing to an archived table while others were writing the the active table. This resulted in a field called "WorkID" being duplicated across the two tables.
Bottom line I am trying to write a query finding duplicates across tables but basing the duplicate only on certain columns.
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May 1, 2008
I get a very strange error when trying to create a find duplicates query. When i try to select a table that has duplicate values it brings up a message box and it says that i must pick a table that has at least one field that's not a memo or OLE data type. I look at my table and I have niether of those in it...pretty much just text and number fields. Does anyone know what's going on?
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May 29, 2014
I used the wizard to create a find duplicates query. I know for a fact that 15 records are duplicates. I'm getting over 300 records. When I dumped the data into Excel and did a pivot table to count the number of records by account number only 15 had a total count of 2. All others only had 1. Why are the ones with no duplicates showing? I just want to see the 15.
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Dec 8, 2005
Hey, all! Thanks for helping, here is my situation.
I have a table with about 70,000 records that have duplicate Address field values. The rest of the field values for those records are different. When I do a find duplicate querry I get the result that 17,000 records have the same address. However, when I do the append qurrey as instructed here: http://support.microsoft.com/?kbid=209183 I get a total of only 600 records in the new table. I have tried deleting all of the indexes for both the new and old table, with no luck.
I'm using Access 2000 on XP Pro.
If anyone could help with this I would greatly appreciate it!
Thanks
Will
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Mar 4, 2008
Hi!
I used the find duplicates from the query wizard and it is not finding all of the duplicates. How can I fix this?
I have only a few fields
Last name, First name, address, parent name, email.
But when I ran the query the first time it found some.
Then I went into the table and I saw several that it did not find.
I don't get it.
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Nov 9, 2006
say i have a table called tblEmployees and i want to find people who have the same name but different employee numbers, can that be done with a query or will that require VBA code? i won't know the names ahead of time, i don't know who has the same name.
for example, columns:
first_name, last_name, employee_num, phone_num, office_num
and i want it to return James Smith with employee_num = 1234 and James Smith with employee_num = 9876.
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Jan 29, 2007
Hi everyone,
I have a query as below:
Row1 Row2 Row3 Row 4 Row 5
1, 2, 2 , 0 , 15
1 , 2 , 2 , 1 , 7
0 , 1 , 1 , 4 , 2
1 , 2 , 2 , 0 , 29
I need to pull our records which have the same entries in Rows 1-4 and then add up Row 5. For example The above query would make three more queries i.e
One
1,2,2,0, 44
Two
1,2,2,1, 7
Three
0,1,1,4, 2
I would then wish to recombine them into one table
Final
1,2,2,0, 44
1,2,2,1 , 7
0,1,1,4, 2.
Is this possible and how would I go about doing this!?
Been scratching my head for awhile now!
thanks eveyrone!
Sue
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Sep 29, 2005
Greetings all,
I have the code below which is giving me grief as I have copied it from a previous usage and it worked fine. I have tried it in a beforeupdate and now as a seperate button on the form and it gives me the same error message; I have tried to put a save command in to save the record without any luck
the code is
If DCount("[Batch]", "tbl_Data_Wine_Batch", "[Batch]=" & Me.Batch) > 0 Then
Cancel = True
End If
The error message is
Run time error 2001
you cancelled the previous operation.
The problem comes up in the dcount expression.
Any help would be great as it is an important part of the project and we can move on once we have overcome this
rbinder
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Jun 5, 2007
Hello all,
I am sure this must be simple, but I can't get my head around it.
I have a query that looks at client bank account numbers, and finds duplicates.
There are a LOT of duplicates, because we have several accounts for the same person.
What I would like to do is find all the records where the account number and sort code match, but where the account NAME is different.
I am trying to find any records where the same account number is being used on more than one account.
All the fields are in a single table.
This is what I have so far, which just finds duplicate sort codes and account numbers;
SELECT CPL_ACCOUNT.ACCOUNT_NUMBER, CPL_ACCOUNT.SORT_CODE, CPL_ACCOUNT.BANK_NAME
FROM CPL_ACCOUNT
WHERE (((CPL_ACCOUNT.ACCOUNT_NUMBER) In (SELECT [ACCOUNT_NUMBER] FROM [CPL_ACCOUNT] As Tmp GROUP BY [ACCOUNT_NUMBER],[SORT_CODE] HAVING Count(*)>1 And [SORT_CODE] = [CPL_ACCOUNT].[SORT_CODE])))
ORDER BY CPL_ACCOUNT.ACCOUNT_NUMBER, CPL_ACCOUNT.SORT_CODE;
Thank you!
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Aug 15, 2013
Access 2007 - I am using the oft used, frequently posted and shard code from srfreemen - modified as below. now I know I sort of broke commandment # 8 - Thou shalt not copy and paste other people's code without at least attempting to understand what it does. but I honestly did try to understand what it does.
I keep getting runtime error 3078 - cannot find the input table or query 'tblEnrolment_Committee_Master'. It is the name of a table in my database but I am missing the very basic element of how to get my form (which draws all of it's fields from that table) to look it up or identify it.
Likely because of a silly basic error. Normally - I wouldn't attempt such things but my work needs me to ensure no duplicates exist in this case AND it's already a primary key - but I don't want to wait until the whole form is filled out for it to identify the duplicate!
How to get the tblEnrolment_Committee_Master to be included in the search and erase this error ...
Private Sub Entitlement_File_Number_BeforeUpdate(Cancel As Integer)
Dim SID As String
Dim stLinkCriteria As String
Dim rsc As DAO.Recordset
Set rsc = Me.RecordsetClone
[Code] .....
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Oct 4, 2014
I have to deal with string arrays that store text. I need info on copying, comparing, appending arrays. Also on passing arrays as parameters to subs or functions. Where I can get to this info quickly without having to browse through many screens.
In addition to this I have some questions:
I have to find the duplicates of values in an array. Here is the code that I use.
Code:
Sub FindDuplicates()
Dim I As Integer, J As Integer, IEND As Integer, text() As String
ReDim text(IEND)
For I = 1 To IEND - 1
For J = I + 1 To IEND
If text(I) = text(J) Then text(J) = ""
Next J
Next I
End Sub
It works but is not performing well. Are there more efficient ways of doing this?
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Apr 24, 2013
I have a Find Duplicates query that I created with the Query Wizard.
IF I run the query and find duplicates, I can close the resultant datasheet with the close button.
IF I run the query and find duplicates and delete them, I can close the resultant datasheet with the close button.
IF I run the query after I have found and deleted duplicates and closed the window, I can close the resultant datasheet (with no records) with the close button.
BUT IF I run the query when there are no duplicates, it opens the datasheet with no records, but you can't close it with the close button. You have to exit the database completely.
I don't know SQL or VB. Have to do this in Access.
I thought about creating an If statement in a macro, but am not sure of the syntax, but this would be the basic statement I would make:
IF Find Duplicates query returns no records,
THEN Cancel Event.
End IF
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Jun 29, 2014
I have a report with 2 access tables (1 Master table and another a daily feed table)
The Master table keeps a log of all incoming records. (once append it to this table, should not show in future reporting)
The Daily feed information within the last 48 hours. (uploaded from an excel report into access temporary table)
When the daily feed table gets completed, I append the records and updated them into the Master to avoid duplication.
When I upload the daily feed table and I match it against the Master table to find duplicates, how can I delete the duplicates from the Daily Feed table?
This is my code to find duplicates:
SELECT CMPreport.ID, CMPreport.MbrName, tblMaster.ID
FROM CMPreport LEFT JOIN tblMaster ON CMPreport.ID = tblMaster.ID
WHERE (((tblMaster.ID) Is Not Null));
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Aug 23, 2005
I have a table in a healthcare patient database that stores Admitting Number, Scan Number, Last Name, and some other fields detailing the scan. Each patient can have multiple scans and I'm trying to design a query that lists how many scans each patient has had by finding all the duplicate admitting numbers. I'm using this SQL statement:
SELECT MultScans.Admitting_Number, Count(MultScans.Admitting_Number) AS Num_Of_Scans
FROM MultScans
GROUP BY MultScans.Admitting_Number
HAVING (((Count(MultScans.Admitting_Number))>1));
which works fine but I can't figure out how to also print out the last name, scan number and the other fields in this query. If I add the field to the select part it says I can't because the expression is not part of the aggregate function and if I add the expression to the 'group by' the query runs but displays all the duplicates. Thanks for any help.
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Apr 4, 2006
Please help. I am having difficulty understanding why a subform is showing duplicates despite using SELECT DISTINCT for its query. I have looked all over the forum but am still quite confused.
I think my database is normalised but this may be the problem and can attach it if necessary.
My query is as follows
SELECT DISTINCT StudentAndCourse.ClassID, StudentAndCourse.LevelID, StudentAndCourse.StudentID
FROM [Level] INNER JOIN (Class INNER JOIN StudentAndCourse ON Class.ClassID=StudentAndCourse.ClassID) ON Level.LevelID=StudentAndCourse.LevelID;
Any help would be most appreciated as I cannot understand what is going wrong.
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May 1, 2007
Hello,
I am just wondering whether there is any way I could run a simple query that would pull all the data I need and inform me of the duplicates if there is any.
Thanks!
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Mar 25, 2008
Hi everyone.
I have a query linking 2 tables. The idea of the query was to show our longest serving customers. The one table contains CustNo, Address details, etc and the second table contains AccNo, CurrBal, AccType, CustNo, etc etc. (note the bold fields are the primary keys). However this is bringing back results on account level rather than customer level, i.e CustNo 3 might Have AccNo xxxxxx, AccNo xxxxx1, AccNo xxxxxx2. How do I get it to show the 'oldest' account for each customer. So it will only show each customer once and that customers oldest account. Heres the SQL for the query. Hope someone can help. Thanks
SELECT DBSINV97.DateOpen, DBSINV97.AccNo, DBSINV97.CustNo, DBSINV97.PostalName, DBSINV97.CurBal, DBSINV97.AccType, DBSINV97.DateClose, DBSCUS01A.Title, DBSCUS01A.Initial, DBSCUS01A.Surname, DBSCUS01A.Street, DBSCUS01A.District, DBSCUS01A.Town, DBSCUS01A.County, DBSCUS01A.Postcode
FROM DBSINV97 INNER JOIN DBSCUS01A ON DBSINV97.CustNo = DBSCUS01A.CustNo
WHERE (((DBSINV97.DateOpen)<"2002-01-01") AND ((DBSINV97.DateClose)="1800-01-01"));
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Mar 26, 2008
I've been researching and reading about how to eliminate duplicates in my Query, but all the suggestions don't seem to work. Here is my problem:
I want to create a Query with information from 2 Tables. Ultimately, I want my Query to be a malining list that I will be sending requests to. But, I want only the names, addesses, etc. of the people who fit certain criteria (info. stored in several different fields of the two tables). So, if a person matches two of my specified criteria, they appear twice in my query. Or if they fit all the criteria, they might appear 5 or 6 times. I want each name and address to show up once, even though the person may fit into several criteria. Does this makes sense?
I've tried typing "DISTINCT" after "SELECT" in SQL, but that didn't do anything. I've also tried changing the "Unique Values" to YES, but that didn't work either.
Sorry if it's unclear, but I am very new to Access! :(
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Nov 24, 2004
Hello
I've created a query that finds duplicate records in a table. I've also made a form based on that query that shows some fields of the duplicate recoeds found. In that form there's also a textbox that counts the records found (using the count([field]) function). Everything works perfectly when there are duplicate records. However, when there are no duplicates , I'd like the textbox value to be 0 (it shows nothing now obviously because the query returns no records), as long as some other actions to be performed. How can I check (in the vb code or somehow else) if the query returns no records as a result ? Thanks in advance
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Jan 9, 2006
Friends,
I have a table with 3 fields:
NAME
AMOUNT1
AMOUNT2
Field AMOUNT1 and AMOUNT 2 can have the same data and I need to run a query which will return records with similar data in both fields. Both fields are text (5 characters) and the match has to be done on the first four characters.
Please note that I have tried with a Find Duplicates query but does not seem to return all the records with showing the same data probably to the fact the the last character is different.
Any help? Thank you.
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Aug 14, 2006
I am running a query to return records from a table. I want to eliminate records from the query if the values contained in one field are duplicated. I have tried using the DISTINCT keyword but it only works if the entire record is unique or if I was retieving just one field
Any suggestions appreciated
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