Tables :: Deleting Duplicate Records

Sep 11, 2013

i have a data base with a primary key but some records have been added from a excel data base and now the data base has duplicate records with different primary keys. I do a Query looking for duplicate records based on a field not the the primary key. There are 315 out of 22000. I can sort the table and then manually delete the dups. The Query does not allow deleting records so finding the culprits in the full Data base is time consuming. How can i delete the duplicate records using a query? Is this function available hidden someplace in the guts of Access? Seems like this would be a frequent problem. The Microsoft forum addresses this problem and the only viable solution is the manual method, when they get to the Query method it looks like they just forgot what the subject was and tell you how to delete one record if you know what the criteria is. If two non Key fields are Identical then i want to delete one of the records.

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Deleting Duplicate Records

Apr 30, 2008

I am having problems deleting various rows from an SQL table, the message coming up is "The row value(s) updated or deleted either do not make the row unique or they alter multiple rows (xxrows). Any Suggestions?

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Deleting Duplicate (but Not Similiar) Records

Jun 10, 2006

Hi,

I currently have a table in Access that contains over 2000 records, with a total of 20 fields (although some records do have null values for certain fields). Some of these records are nearly identical to one another and differ only in one or two fields. Others, however, are exact duplicates. Is there any way I can quickly go through the table and delete those records which are duplicates but, at the same time, ensure that those which are only similiar aren't deleted?

Thanks for any help!

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Merging And Deleting Duplicate Records

Jan 6, 2012

I have an Access table with a number of records which refer to the same [InvoiceNo] but with data in different fields. Normally, my database works like this:

1)Import data from Excel File to tblMain in Access
2)Import data from Excel File to tblVendorLine in Access
3)Import data from Excel File to tblDunning in Access
4)Query is sorting from two first tables only records that refer to the third one (by InvoiceNo)
5)We have only items from tblDunning with data from other two tables to be send (mail to the vendor).

The point is, that when I have relation between those three tables, I receive only few records, but sometimes - for example - tblDunning refers to 5 records in tblMain and to 7 records in tblVendorLine - but there is only 4 records related between tblMain and tblVendorLine, so query shows me only two records. Ive made a query for each table (tblMain & tblVendorLine - relation with tblDunning). Then make one query of those two queries. It append data to new table tblDunnAll

So for example the table would look like this after

Vendor | InvoiceNo | CoCode | Status | Clearing_Date | PBk
100000 23333 GB11 23/12/2011
233332 121212 GB18 16/12/2011
233332 121212 Complete K
134444 777777 GB12 Complete
100000 23333 GB11 Complete K

What I'd like to have is a table with:

Vendor | InvoiceNo | CoCode | Status | Clearing_Date | PBk
100000 23333 GB11 Complete 23/12/2011 K
233332 121212 GB18 Complete 16/12/2011 K
134444 777777 GB12 Complete

how to go about merging the data for each name into one record. There are lots of very useful posting about using SQL to delete duplicate but I can't find a posting with addresses this issue.

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Tables :: Deleting Matching Records From Two Tables

Dec 5, 2012

I have two tables "Master List" and "Audit". I want to delete the records from the "Master" that match those in the "Audit". I am using Access 2010 and have used it often but have built very few queries.

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Tables :: Keeping Records Rather Than Deleting?

Oct 31, 2014

If a user wishes to delete a record, rather than deleting the record i'd like to change its status to not current for instance.

The reason being that the information in the records may be useful for statistical use.

I added a yes/no field to the table and then added some code to a delete button to change the yes/no.

I can't seem to hide these records from my forms (using filter) but I could be going the wrong way about it.

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2 Tables - VIEW Duplicate Records

Feb 3, 2005

I have 2 tables that have the same structure and same column names - Table A and TAble B. If field1, field2, field3, field4, and field5 match - I want to see that duplicates exist.

How do I do it with 2 tables? I know the query wizard check for duplicates can do it in one table - but I need to compare the two.

thanks.

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Cannot Allow Duplicate Records In 2 Tables Based On 2 Criteria

Sep 26, 2005

Dear all,

I would like to seek your help on this problem.

I would like to do a search for my records based on 2 different criterias. If found, the function should just return a boolean value so that I can act further based on the boolean value.

The reason I'm doing this is that I have 2 similar tables that contains EventID and AttendeeID and these 2 tables cannot have the same EventID and AttendeeID. So before I can allow a record to be inserted in the 1st table, it must check that there is no record in the 2nd table that has the same EventID and AttendeID. If there is, then i cannot allow the record to be inserted in the 1st table.

The same thing applies when I want to insert a record in the 2nd table. It must now check the first table.

Recordset.find seems to be only catering to 1 criteria, not 2.

Pls help. Codes are most welcome too.

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Tables :: Removing Duplicate Records From One Table

Feb 18, 2014

I have a table with at least 13.000.000 records. There are many duplicates records... For example

ID Name Family mobile car number chassis Register_Year
1 Roy Jalbout 9999 123456/G ASF4546 2005
2 Roy Jalbout 9999 854658/G GRK554JFJD 2009
3 Tony Elishah 1234 854658/G GRK554JFJD 2012
4 Sam Markos 5478 854658/G GRK554JFJD 2014
5 Roy Jalbout 9999 123456/G ASF4546 2005

As you can see ID Number 2,3,4 have the same car but every one bought from another so it's not duplicates

The duplicates here is the ID's number 1,5. So how to remove the duplicates. I remember you i have at least 13.000.000 records. I try to make a query to find duplicates then i make a copy of the original table and than i should make a primary key then append the data from the original table to the copy table, but here i have more than one criteria

When I made a query to find duplicates the result was 680.000 records and every one have a minimum 2 duplicates an maximum 4 duplicates so it's about 2.500.000 duplicates records at least....

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Deleting Duplicate Values

Feb 16, 2005

I have a table which has duplicate values and i need to delete them, how do i do that?the table fields are

field1 field2 field3 Field4
1 a aa bb
1 a aa bb
1 b bc ab
2 a aa bb
2 a aa bb


I want to delete the ones which are bb in Field 4 and keep only bb value, how do i do this?

Thanks

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Tables :: Detect / Delete Duplicate Records In A Table

Apr 22, 2014

I'm wondering if it's possible to create a Query / Macro / VBA or whatever works, to detect the duplicate records in a table and delete them with the push of a command button. Or, even to do this automatically when the database opens using an AutoExec macro or something ?. I'd like for one copy of each record to be left intact in the table.

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Tables :: Unique Identifier - Increment For Duplicate Records

Jul 10, 2014

I'm currently in the process of doing a an overhaul of the database including a table, some odd 17,500 records long.

What I need to do is to create a unique identifier from the existing part number, almost like an autonumber, but it only increments when there are duplicates. What I mean is that there would be for example, there would be five records of say, part 000135.

What I'm trying to get at is, how I would have to code to grab the existing part numbers (all formatted to be 6 digits), add an extra 2 digits to be its unique identifier, and then save it all to a Unique Identifier column, that I created.

An example of what I want is say, I have part numbers 000135 and 000136. The numbers would go up from 000135-01, 000135-02, 000135-03, 000136-01, 000136-02.... The dash is not as important as implementing the 2 digit unique identifier.

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Tables :: Unique Multicolumn - Avoid Duplicate Records

May 28, 2014

I have 3 tables

tbl1 :
NameID
Name

tbl2 :
CatID
Category

tbl3 :
ProdID
CatID
NameID
Remarks

How can I avoid duplicate records in tbl3? Since remarks can be Null? product is later used in tblInventory...

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Tables :: How To Keep Data From Importing Duplicate Records Based On One Field

Sep 11, 2012

I'm able to import new data from excel just fine, but I can't import updated data from excel due to duplicates not being allowed for a particular field. Is there a way to keep from importing duplicate records based on one field, but still import data from other fields where the information is different from the excel file?

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Deleting Duplicate Values Based On 2 Fields

Jan 3, 2006

Hi guys,

I have a question I've been trying to figure out with no luck. I have 2 fields, companyname and zip, these 2 fields may have duplicate values or they may be uniquei.e.

companyname zip
billybobs 68135
dilberts 68137
billybobs 68135

what I need to do is delete all of the duplicate records where both companyname and zip match. Is there a way I can do that with a query?

Any help is greatly appreciated

Thanks

James

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Tables :: Merge Duplicate / Similar Records Into 1 Record In Access 2010

Jun 9, 2014

Is there a way to merge duplicate/similar Access 2010 records into one record?

I have an Access table with 1,000 duplicate records, although they are similar and not exact duplicates. As you can see below, some records contain information that other records do not. Yet, the primary key is the same for all duplicate records. I want to find a way to merge data from filled cells of duplicate records into empty cells for each duplicate record. I do not want to concatenate the data (i.e. combine last and first name, etc.). I only want to fill empty cells if there is a match for it in a duplicate record. I will delete the newly exact duplicate records later. Short of correcting the records by hand.

Example

Code:
LastName FirstName SSN Address Phone Email
Doe John 123-45-7891 123 Anywhere St. NULL john(at)gmail.com
Doe John 123-45-7891 NULL (123)456-7890 NULL

Desired Result

Code:
LastName FirstName SSN Address Phone Email
Doe John 123-45-7891 123 Anywhere St. (123)456-7890 john(at)gmail.com
Doe John 123-45-7891 123 Anywhere St. (123)456-7890 john(at)gmail.com

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Deleting All Related Sub Records When Deleting The "main" Record.

Apr 12, 2008

I have two tables.

1. Persons (list of persons)
2. Job history (list of jobs)

each person have their own job history. all these jobs are stored in the job history table. when i delete a person i would like the job history for this person deleted as well. each job stored in the job table have a field with person name, so that it is linked to this person.

how can i do this? vba or simple properties options?

- Roy

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Deleting Records

Aug 4, 2005

I have two tables (same data but slightly different attribute structure) with a one-to-one relationship (the join field is "ID"). There are 69 matching records in these tables. How can I delete these matching records from table A, while leaving them alone in table B?

I'm confused because I brought both tables into a select query, created a join from ID to ID (within in the query's design view), and then added all fields from table A to the query. I then ran the select query and saw the 69 records from table A in the query's data view that I wanted to delete, highlighted all records and clicked delete. However, this action deleted the 69 matching records from TABLE B, not Table A!!! How is this possible? What should I do instead? Thanks.

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Deleting Records

Nov 11, 2005

A strange request but I hope someone can help with this one

I have a table (tbl_Econ) where I have to delete a specified number of records from a table. It does not matter which records as long as I delete the exact number

e.g On a form text box I enter the number or records to be deleted (e.g.6000).

The table (tbl_Econ) has 8000 records, so I have to delete 6000 records. I need to be able to do this automatically :eek:

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Deleting Records

Feb 1, 2006

How can I go about deleting records fully? So that there autonumber, etc can be used again without access moaning.

Thanks :D

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Deleting Records

Mar 14, 2006

I have a query (Query1) which returns results In one field recordID.

How do I delete records in a table where the RecordID is in the list Query1.recordID?

Thanks

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Deleting Records

Jan 25, 2008

Hi,

how would i go about deleting a set of records? i can get a list of records together in a query taken from 4 tables and would need to, if necessary, delete a single line. not all information needs to be deleted from all 4 tables though? the info to be deleted would only be deleted from 1 or 2 tables being the last 2 in the relationship.

i guessed it might be an append query but im not too familiar with them.

any chance of a possible suggestion?

many thanks,

NS

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Deleting Records

Oct 17, 2007

I am having trouble with my autonumbers when i have to delete a record.

Can anyone help me out with auto numbers?

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Deleting Certain Records Using SQL

Dec 14, 2006

Hi there, i have a master reset to delete all the data in the database. Although, as there is a username and password entry to get into the admin module, i wish for one entry in the table participantTable to not get deleted (to save one password/username so its possible to log into the admin module after the reset). The code below will delete everything, how can i change it so it keeps the first record in the table, and then deletes all the other records after.

DoCmd.RunSQL "DELETE * from participantTable"

Thanks in advance

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Deleting Records And Autonumber ??

Jan 25, 2006

quick question guys...

if i have a sales order that the sales order # is an autonumber and i manually delete the records my next new record still follows the last number i had before that is now deleted..

example

sales order 1001
sales order 1002

if i delete all the records on the table and clean it all out

the next new autonumber will be 1003...

i want it to be 1001 again...
and yes its set to an index of no dups

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Deleting Records And A One To One Relationship.

Mar 19, 2007

Hello all,

I have 3 tables:
1. customer
2. DVD collection
3. Borrow

The aim of this system is to create a home borrowing system.

The customer table has a one to many relationship with the borrow table, while the dvd collection has a one to one with borrow. I can create a new book with no problem, and even view these on a form. Here my proble arises.

I ahve another form to return a DVD. I view the records from the borrow table, and once found what i want there is a button which deletes the record from the borrow table. Sadly, when i press this button, not only does it delete the record in the borrow table, but it will also delete the record from the DVD collection table.

I have tried everything i can think of, and i don't want to change to change the design as i have found this mnethod very easy to generate reports and the like. Any help??

Thanks

EDIT: the button i used was from the wizard that comes up when you create a button.

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