Access :: Cannot Remove Duplicates Using Primary Key

What Is The Best Way To Remove Duplicates

Apr 12, 2007

I have a query linked to a main frame database. One of the fields is [significance] and gets a number 1-20. Usually when this data is entered, it gets multiple significance numbers. This causes my query to return separate records for each significance number. For example if case number 123 is given significance codes 1, 5 and 12, then my query returns 3 records.

I need a query that will show all records one time that have a significance code other than 12. This would be easy if there were not duplicate entries for the same case number because I could simply say "Not 12". So in the example above, my query returns 2 records showing significance codes 1 and 5. But I don't want to see the record for case number 123 because it also has a 12 significance code.

So what is the best way to handle this?

I appreciate the help.

Jim

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Remove Duplicates

Jun 14, 2007

If have a table with billing occurances and one of the fields is "business name" how would I need to setup a make table query which lists unique occurances within that data?

Essentially, I want to remove duplicates. If ABC Pet Store has 5 billing occurances and XYZ Pet Store has 1... I want both to only be listed once.

I hope that makes sense. Thanks for any help as to how to set this up!

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How To Remove DUPLICATES

Sep 3, 2004

I would like to remove duplicates from the following query. I would like it to display only one record depending on the InvoiceID. So only show one unique record based on Invoices.InvoiceID. Thanks!

SELECT DISTINCT Invoices.InvoiceID, Invoices.CustomerID, InvoiceDetails.InvoiceDetailID, Invoices.InvoiceDate
FROM InvoiceDetails INNER JOIN Invoices ON InvoiceDetails.InvoiceID = Invoices.InvoiceID
WHERE (((Invoices.InvoiceDate) Between #8/1/2004# And #8/31/2004#) AND ((InvoiceDetails.DeliverBy)=0))
ORDER BY Invoices.InvoiceID;

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Want To Remove Duplicates From A SQL Code

Dec 31, 2013

I have the below code but I want to add a grouping to it so that if there is a duplicate building number it will not list it. Is there a way to add a grouping into the code to do this?

SELECT Q_PI_Qrtly_Insp_Ct_Range.District, Q_PI_Qrtly_Insp_Ct_Range.Bldg_Number,
Q_PI_Qrtly_Insp_Ct_Range.Bldg_Name, Q_PI_Qrtly_Insp_Ct_Range.Address, Q_PI_Qrtly_Insp_Ct_Range.City,
Q_PI_Qrtly_Insp_Ct_Range.State, Q_PI_Qrtly_Insp_Ct_Range.FSL, Count(Q_PI_Qrtly_Insp_Ct_Range.Insp_Date) AS CountOfInsp_Date, Q_PI_Qrtly_Insp_Ct_Range.Due, Lookup_Tbl_Commander_Inspector.Commander

[code]...

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How To Remove The Primary Key?

Sep 1, 2005

Hi All,

I have one serious emergency.

I have 2 options (2 qeustions) in front of me.

[1] How can I remove primary key and not the column
[2] How can I rename the column which is primary key.

Please help me.

Thanks in advance

Jigs

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Remove Duplicates But Keep Uniqe Identifyer??

Jun 6, 2005

I have a table of 50,000 reccords. The table has 8 fields of theses eight fields I want to remove duplicates based on 4 of the fields in a query. Is there a way I can do this and keep the uniqe identifyer so that after the duplicates are removed from those 4 fields I can match them back up with the other four fields????

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Remove Duplicates From Query/form

Nov 10, 2005

Hi,

I have the following set up on a form to pull together a query (by form) and resulting report:

Publication
Sector
Product
Region

Each publication can have multiple sectors/products/regions. The resulting query therefore duplicates the publication, for example:

Publication 1 Sector 1 Product 1 Region 1
Publication 1 sector 2 product 1 region 1
publication 1 sector 2 product 2 region 1

etc etc...

The report ONLY has publication on it, but as it is based upon the query utilising the 4 factors above, the resulting report is:
Pub 1
Pub 1
Pub 1
Pub 2
etc

I want the report to only list the publications once - i have tried "hide duplicates" from the form field properties, however this hides the text but leaves a big gap on the resulting report when generated where the duplicate would be if it were not hidden.

There must be a simpler way to acheive this than getting another query to create a table based on the first query which (the table) only includes the publication name, and is filtered to remove duplicates through a primary key...

Can anyone help!?

cheers
amx

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Remove Duplicates From Four Different Fields/columns

Jul 31, 2007

Hi everyone,

I am working on a database to manage newsletter subscriptions. Each subscriber record has the option of having up to four email addresses registered to his/her name.

Is there a way to check for duplicate email addresses in the entire database? It would have to compare all values in all four fields of all records.

Any ideas on how to implement such a thing? I'm clueless...

Thanks!

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Remove Duplicates With Conditional Criteria

Feb 27, 2014

I am trying to design a delete query that has an additional criteria needed.

I want to delete identical IDs in one column only if there are identical values in an adjacent column.

So for example, in the table below I want to delete the last row where the duplicate ID is "2700023" because the Code field has identical values, "LRAC". I do not want to delete the second row because the Code field is different for the row.

ID Code
2699974 BCC
2699974 SRAC

2700023 LRAC
2700023 LRAC

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Is There Any Way To Make A Primary Key Contain Duplicates??

Mar 3, 2006

hi,

is there any way to make a primary Key contain duplicates??

any ideas ??

Many thanks

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Queries :: Remove Duplicates Entries In Table?

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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Queries :: Remove Duplicates - If 2 Fields Are Equal

Nov 19, 2013

I have a large table with many fields and many rows. There is no primary key. I'll call one field ParentPN, and another field ChildPN. There are many other fields as well. I want to identify all rows where BOTH the ParentPN and ChildPN occur more than once. I know how to create a query to identify duplicates of ONE field in the table, but not two. I can solve this with VBA: I will read the two fields of interest in the first row, then compare both values with every other row. If it finds another row with BOTH ParentPN and ChildPN identical with the first, that's a "hit". Then, repeat with all the other rows. I could find ways to make this run faster, but I was wondering if there are any build in functions to accomplish this. I looked at the Find Duplicates query builder, and all I see is I can select ONE field to search for dupes, not two.

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Combine Tables - Remove Duplicates And Add Fields

Sep 28, 2015

I have 4 or 5 tables. Most of the fields are exactly the name but they all have at least 1 to possibly 5 or six fields that are not in the other table. Additionally there are some duplicates within the individual tables as well as across tables.

i.e.

I have a

Student Table - with all the info on the student as well as a column called student that identifies them as such however it does not have the columns parent, donor, appeal, designation.....
Parent Table - with all the info on the student as well as a column called parent that identifies them as such however it does not have the columns student, donor, appeal, designation.....
Donor Table - with all the info on the student as well as a column called donor that identifies them as such however it does not have the columns student, parent, appeal, designation.....
Appeal Table - with all the info on the student as well as a column called appeal that identifies them as such however it does not have the columns student, parent, donor, designation.....

-A person can be within one of these tables more than once but with all the same information.
-A person can also fall into all of these parameters so they could be on every table with the same information in addition to the missing columns,=.

Question 1 : what is the best way to dedupe and delete the individual tables (they all have account numbers)
Question 2: I was thinking create a new table with all the columns available, however how do i dedupe across tables while populating the additional columns from each?

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Update Related Records And Remove Duplicates

Mar 18, 2014

I have two tables, one is of departments, and one is of people (with a FK denoting what department this person is in). Now consider the fact that there are duplicates in the departments table, and I would like to remove these duplicates. However, the duplicates have related records (in the people table). So, before removing the duplicates, I must update the FKs in the table of people (this is the step I'm having trouble with).

Here's an example:

As you can see, the "Sales" department is there twice. And both have a related record. What I want to do is:
Update all DepartmentIDs (in tblPeople) to not point to duplicate records. In this example, that would be PersonID 2; Joe. His DepartmentID should update to "1" (as both "1" and "2" are "Sales").Delete the duplicates in tblDepartments (in this case, DepartmentID 2, "Sales").

The second step is no problem, it is only the first I am struggling with.

Also, the example posted here is just an example, the data I actually need to do this for is significantly more complex and there are many more records! In the attached database:

qry1: Simple query to find all duplicates (just used the query wizard)
qry2: Just the first row of each duplicated departments (duplicates that shouldn't be deleted). In the example above, this would be the "2", "Sales" row in the tblDepartments table.
qry3: Basically all qry1 rows that don't appear in qry2
qry4: All qry3 values, and their respective qry2 value.

This is what each of the (soon to be deleted) duplicate values' related records' DepartmentID should be updated to... There's no simpler way to phrase that, so using the example above, qry4 would return "2","1". This indicates that all people with a DepartmentID of "2" should be changed to "1" (so we can subsequently erase the department with the ID of 2.

This is as far as I have gotten. My next step is: Update all FKs in tblPeople based on qry4 (You can't set an update query's criteria to pull from another query, nor can you use the second query for the update value... or maybe you can, but I don't know about it).

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Queries :: Deleting Duplicates Without Primary Key?

Nov 4, 2013

I bounced into a big problem with Access 2010 where I cannot seem to be able to remove duplicates from a table containing millions of entries midway through a series of queries.

The table is formed like this:

Date - Serial Number - Reading 1 - Reading 2 - Reading 3
30.7.2013 - 1122334455 - 12345 - 987654 - 654321
30.7.2013 - 1122334466 - 12345 - 987654 - 654321
29.7.2013 - 1122334455 - 12210 - 987654 - 643210
29.7.2013 - 1122334455 - 12210 - 987654 - 643210
29.7.2013 - 1122334466 - 12344 - 986013 - 453213

As you can see, there are some rows which contain exact duplicates and some are a bit different. I wish to remove those fields with exact duplicates and only the duplicated fields. Running "Find duplicates" in Access gives me about 250,000 rows with such data.

I've tried a few options already:
- I cannot use the date as primary key as there are several serial numbers. I cannot use serial numbers as primary key, because there are several dates. Using reading value as primary isn't an option either.
- Microsoft says I should mark all duplicate values with an x and then make a delete query to get rid of all the x-marked rows. For 250,000 duplicates, that's a bit too much manual 'x-ing'.
- If I do a delete query using the Find Duplicates query as a base, it removes all 250,000 entries from that table, instead of just the 125,000 which had a duplicate elsewhere in the table.
- If I make a query which identifies duplicate data and gives me just one row for each duplicate, the delete query still deletes both entries from the original table.
- I could make a new query which would have only unique values using Totals as criteria (for instance, using First for the Date-column). However, this still leaves the duplicate values in the original table. Note that this database is already 800 MB large and new data is imported once a week, for the next decade or so. I cannot have a table get duplicates every week and leave it there.
- If I make a macro which would create the unique values table first and then deletes the old table, what happens next week when I try to import new readings? I would need to make a new macro each time I try to import new data as the table names change. Or is there a way to first run the unique numbers out, then replace the original table with the new one? With a 800MB database, this would put me dangerously close to the 2GB size limit. I wouldn't be able to use this as a part of a macro, as the database would have to do Compact & Repair each time it deletes the original table, midway through a longer series of queries.
- Having duplicates removed from the original import isn't an option either, as it comes in as a overriding excel sheet for the past 3 months, once a week.

As you can see, it's quite a pickle getting the duplicates out of the original table. This is just a small part of a very long macro, which takes about 15 minutes to complete, but due to duplicates the database is getting way too large.

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Queries :: Find Duplicates From 2 Tables And Remove From 1 Table

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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Modules & VBA :: Create A Simple Report But Remove Duplicates

Nov 4, 2013

I have a simple spreadsheet:

Ref# Rev
97 b
98 c
99 c
99 e
100 c
100 b
101 a
102 b

I need to create a simple report but remove the duplicates (ex. Ref# 99,100). I need to delete the older Rev's (Ex Ref# 99 Rev C, Ref# 100 Rev B).Is this done throughRecordsets? will an SQL query do the trick?

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Queries :: How To Remove Duplicates On Reference Number Field

Aug 28, 2013

I have a query which gets information from 2x tables where the I'd on one table is the reference number on the second table.I would like to know how I can remove the duplicates on my reference number field?

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Modules & VBA :: Normalize Data In Array / Remove Duplicates And Import

Dec 18, 2013

I have some data in an array that I need to normalize, remove duplicates, and import.

Original Table

Every record in the array has a person, all but a few have an address, most have a phone, and some have an email.

Person----- Address ----- Phone ----- Email
Tom ----- 10 A Ln ----- 789... ----- e@a
Sue ----- 20 B Ln ----- 256... ----- _____
Sam ----- 30 C Ln ----- _____ ----- _____
Dan ----- 40 D Ln ----- 478... ----- _____
Jan ----- 40 D Ln ----- 567... ----- e@d
Stu ----- 50 E Ln ----- _____ ----- _____
Syd ----- ______ ------ 224... ----- _____

New Data Structure

I want to group the data by HouseHold; which Address will serve to define for this import.

tblHouseHold
hhID
tblAddress
adrID, hhID, Address
tblPerson
prsID, hhID, Person
tblPhone
phnID, hhID, Phone
tblEmail
emlID, hhID, Email

I've been working on a procedure to step through the recordset and add the data one record at a time so I can get rid of the duplicates.

I've tried a few approaches, but this is where I'm at now.

Code:

Dim rs As DAO.Recordset
Dim rsHH As DAO.Recordset
Dim rsPhone As DAO.Recordset
Dim rsEmail As DAO.Recordset
Dim rsAddress As DAO.Recordset
Dim rsPerson As DAO.Recordset
Dim db As DAO.Database
Set db = CurrentDb

[Code] .....

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Possible To Remove Duplicates From A Query Based On Values In Single Column?

May 14, 2015

I have a query that displays this

Column1 Column 2 Column 3 Column 4
TripTitleA TravelerA N/A N/A
TripTItleB TravelerB N/A N/A
TripTitleC TravelerC TravelerD TravelerE
TripTitleC TravelerD TravelerC TravelerE
TripTItleC TravelerE TravelerC TravelerD
TripTitleD TravelerF N/A N/A

I want to filter Column1 to have no duplicates so it looks like this

Column1 Column 2 Column 3 Column 4
TripTitleA TravelerA N/A N/A
TripTItleB TravelerB N/A N/A
TripTitleC TravelerC TravelerD TravelerE
TripTitleD TravelerF N/A N/A

Is this possible?

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Find Duplicates And Create Table With Dates Of Duplicates

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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Find Duplicates Different Than Duplicates Deleted

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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Changing From Duplicates OK To No Duplicates

Nov 1, 2014

I have an Access table with an indexed key that is currently set to duplicates OK. There are not supposed to be any duplicates in that field. But it is possible than a small number have crept through.

Two questions:

1. What would happen to those duplicate records if I changed the setting from duplicates OK to no duplicates?

2. Is there any way to ferret out those duplicate records first and change them manually? The table currently has 48000 records so it would be a pain to go through them page by page. (I know how to export them to Excel, where the dups can easily be found; I was just wondering if something could do it within Access.)

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Primary Key No Longer Primary Key!

Sep 15, 2006

I have created a very simple Access database with a CompaniesTbl, ContactsTbl and CallsTbl. The database is used to record telesales contact with customers. The tables are set up like this:

The CompaniesTbl has an AutoNumber Primary Key field called CompanyID.

The ContactsTbl has an AutoNumber Primary Key field called ContactID and a foreign key called CompanyID.

The CallsTbl has an AutoNumber Primary Key field called CallID and foreign key called ContactID.

The relationships are set up in the relationships window and referential integrity imposed.

Twice now, while editing a contact record, an error has occured. Task Manager has had to be used to get out of it. The error is either a 'run-time error with a message that does not mean anything' or it says 'unrecognized database format' (!?).

If you open the database again the ContactID field in the Contacts Table is no longer a Primary Key field. If you look in the relationships window - the relationship between the Companies and Contacts tables no longer exists.

Any ideas much appreciated.

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Odd Duplicates

Jul 5, 2007

Hi. I have two tables, of which i have run a duplicate query, removed the duplicates by doing an "is null" criteria, and keeping that new table.
I know though there are still more duplicates but the names may not be exactly the same, say barclays and barclays plc. so i run another query on both tables to show me the first five letters of table 1 and table 2. I can run another "is null" criteria query to find the non duplicates there. these are the unique values.

But even if there are duplicates up to the first five letters the next letter may change, for instance barcleys tractors and barclays bank. So these arent duplicates.
So can anyone come up with a way of taking the duplicate ones according to the first five letters, and maybe duplicate ones up to 10 letters, and working out which ones are the unique ones. my brain is frying.

thanks
alex

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