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 :: 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 :: More Than One Unique Values - Prevent Entry Of Duplicate Combination Of Fields

Nov 4, 2014

1. I have a database (see attached) with three tables all of them with the same fields. The first three are numbers (InCo_No, Proto_No, Year_No). Each of these fields (numbers) can be the same in the other table(eg. Year_No), but the combination of the three cannot be.

How can I prevent the entry of a duplicate combination of these three fields?

2. I want to have a form to fill the three tables separately, depending the values in the other fields.

How can I do this?

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How To Avoid Duplicate Data

Apr 28, 2006

I have inherited a 5 table database which is associated with membership details and all tables are linked via the membership number which appears in every table..eg
Main Register
membernumber, surname, forename, age etc etc etc
Home address
membernumber, address1, address2, address3, postcode
Business address
membernumber, company name, address1, address2,etc etc etc
Subscription
membernumber, grade, subscription, bank account, etc etc
Training
membernumber, college, results, etc etc

I am informed that it is bad practice to have duplicate data in multiple tables (ie. membernumber field) as updating the data item would be difficult (eg. if the members number needed to be changed for any reason). If this is the case how would I restructure the tables but maintain the link through the membernumber?

I am fairly new to Access....as you can no doubt tell.

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How To Avoid Duplicate Column Values In Access Reports

Dec 31, 2010

I have a report which has say two columns - staff number and visit date. For a staff number (which is unique) there may be more than one visit date. But I want to list a staff number only once and not multiple times in the column (but want all the visit dates of course). How can I do that?

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Modules & VBA :: Adding Additional Sequential Number To Avoid Duplicate Value

Jun 10, 2013

I am not sure if it is possible to implement this but I would like your input. We get request from client via a web based form which contains a unique ID number called RDEFNumber. When we process the request internally, we use this number to identify the request throughout the process. The request from client contains processing of multiple files which are transmitted to us in different times of the day or days.

Every time we receive a file, an email is sent to the IT team with all the information about the file. We use an internal database to send the email to the IT team and use the RDEFNumber as the identifier in the subject line. What I am trying to do is to add an additional number at the end of the RDEFNumber automatically to differentiate the subject line.

For example, we take "1791" as a RDEFNumber. For the first time we enter 1791 to the database RDEFNumber field, it should check the table "tblRDEF" (record source) for duplicate value. If no Duplicate exists, it should keep the number as same. When we get the next file for processing with the same 1791 number and enter this number in the RDEFNumber field, it should automatically change it to "1791-1" since "1791" already exists in the database. When we get the next file, the number should change to "1791-2" and then "1791-3" and on.

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Finding Unique Records Between 2 Tables

May 12, 2006

Dear all,

Many thanks for taking the time to read this.

I have a slight problem which seems like it should be easy to solve but I have no idea how to do it.

I have 2 tables (table1 and table2 for instance) Table2 contains more data than table1 but should contain everything in table1 as well as more.

How is it possible to return just records that are in table2 that are not in table1

Eg

Table1 contains:

IDab
112
222
322
422
511
611
711

Table2 contains:

IDab
112
222
322
422
511
611
711
833

The query should return just the line:
833
as this is unique.

thanks again

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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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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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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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Forms :: DCount In Forms To Avoid Duplicate Record

May 31, 2014

How can I prevent duplicate records from being added from a form, the dcount in the text field property, trigged before update is where this should be used is what I know but having trouble with the syntax.

I've got the table tblInvnetoryDetail with InvID(AutoNumber), and SerialNumber. The form text field is txtSerialNumber. I've managed this far with the expression

DCount([InvID],"tblinventoryDetail","[txtSerialNumber]=&"'") but this did not work.

How can I get the expression to avoid duplicates.

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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 :: 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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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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Merge Duplicate Values With Unique ID

Feb 28, 2014

I have a query with over 85,000 lines of data where each row has a unique id but the unique id appears multiple times within the table. For example, there is a unique numeric id tide to various types of pets across four columns. So the id number 1 could appear in four different rows each with different pets. Please see the first attachment "Original Table"

I want to be able to create a table that has one for for each unique id with all of the corresponding pet data. Please see the attached "Desired Table".

Attachment 300829

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Queries :: Merge Duplicate Values With Unique ID

Feb 28, 2014

I have a query with over 85,000 lines of data where each row has a unique id but the unique id appears multiple times within the table. For example, there is a unique numeric id tide to various types of pets across four columns. So the id number 1 could appear in four different rows each with different pets. See the first attachment "Original Table"

I want to be able to create a table that has one for for each unique id with all of the corresponding pet data. See the attached "Desired Table".

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Tables :: Avoid Double Bookings In Simple Database?

Jun 7, 2013

I work across a number of small venues which have art cases that can be booked for displays. I am trying to build a simple data base to report what space is available and also what art is currently being displayed. The art is usually booked by month, but sometime it can be booked for a week etc.

I have set up 3 tables

Art Inventory

Art Cases by Venue

Art Case Bookings

In the art case booking form, I have set up the start and end date but I cannot figure out how to avoid double bookings of a case? Once I have that worked out I believe I know how to build the required reports for my needs.

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Queries :: Merging Two Separate Databases With Duplicate As Well As Unique Information

Jun 12, 2013

Currently am trying to get together two separate Access Databases into one, which is the way it was always supposed to be.

Basically, this person accidentally created a duplicate of the database in question, and has been updating both independently at different times, meaning that whilst a lot of the database information is duplicate, there are some instances where each separate database copy has unique information on both existing contacts, and new unique contacts.

The database itself is about schools, and has tables concerning information such as calls made, contact details, school details, etc etc. Obviously all of this needs putting back together into one set of tables in one file.

I've been messing around with append and import functions, but am having issues with duplicate ID fields with append queries, and a general lack of direction on the best way to go about fixing this problem, if its even possible.

Here's an example of what i've been trying to do:

INSERT INTO Contacts ( ContactID, ContactTitle, Name, Surname, JobTitle, TelephoneSTD, Telephone, FaxSTD, Fax, Locale, SubjectKeyword, SchoolID, Reply received] )
SELECT [1Contacts].*, [1Contacts].ContactID, [1Contacts].ContactTitle, [1Contacts].Name, [1Contacts].Surname, [1Contacts].JobTitle, [1Contacts].TelephoneSTD, [1Contacts].Telephone, [1Contacts].FaxSTD, [1Contacts].Fax, [1Contacts].Locale, [1Contacts].SubjectKeyword, [1Contacts].SchoolID, [1Contacts].[Reply received]
FROM 1Contacts;

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Forms :: How To Avoid Creating Extra Empty Records In Input Form

Sep 18, 2014

I always have a problem with input forms in Access in that I usually end up with an empty excess record which is being created because I do not know how to program this correctly.

I have a Purchase Order Receipt form (frmPurchase). When I receive a certain quantity of an article associated with a lot number (or a serial number) I have another input form opening up (frmLotorSerial), passing to it through Openargs, the article and the quantity received.

Say we receive 10 units of which we want to register the serial number, I want the user to be able to enter a maximum of 10 units (could be 10 records if each record = 1 serial number, but it could be less than 10 if we have several units per lot number), and not one more, into this frmLotorSerial.

The record looks like this:
-key
-artno (article)
-recqty (quantity received)
-date
-warehouse
-lot number

I used the lost_focus event on lot number to check whether the total received quantity in this form matches the total passed to it from the Purchase form, and if it does to stop the input. Since I could not close the window in the code of this event (error 2585) I moved the close command to the current event of the form.

Doing this closes the form all right, but it always creates one record extra, which of course does not carry any information, apart from the date which has a default value of now.

How should I program/what events should I use to:
-test that the user should not go any further (total received in frmLotorSerial = total received in frmPurchase)
-close the window and, above all, not create this extra record.

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Help With Multicolumn Comboboxes

Sep 22, 2005

I created a combobox with 2 columns, and i donīt know how to fill it using code, I tried with :

combobox.AddItem ("table.fields(0) ; table.fields(1)")

also tried

combobox.rowsource

but when I run it, it shows them litteraly and not the value stored in the tables thank you for your help!

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Forms :: Display Data In Multicolumn Combobox

Jul 7, 2015

I have a main form and a several subforms. The main form displays potential customer data and 1 of the subforms displays the advertisement that prompted that customer to call. 1 of the Advertisements is newspaper ads and for that one we want to track which newspaper.

The subform has 3 pieces of data. The advertisement type, advertisement date and a hidden field for the customer ID to link those to the appropriate customer. There is also a requirement for a field for the advertisement source for newspaper ads.

Data Structure:
Customer Table
CustomerID
Customer demographic data as fields

Advertisementtype
AdvertisementTypeID
AdvertisementType

SpecificAdvertisement.
SpecAdvID
Advertisementtypeid
advertisementdate
advsource

sample data
Customer
1
John
Smith
1234 some st
somecity
somest
somezip

Advtypes
1 google
2 Newspaper
3 Radio

specificAdv
2
7/7/2015
Daily Press

I have a combo box that gets the advtype Then another combo box that gets the adv date the issue I'm having is I also need the source and If I put it in the combo box it only displays when that combobox has the focus otherwise only the date shows. If I try to use a textbox to display the data I can only get the firstcolumn in the combobox and not the column I want. If I use the same query the combobox uses but only having the source in the select criteria I get the same data for every record. Since there are multiple advertisements and a customer could reply to any of them or all of them.

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Modules & VBA :: Reversing Rowsource Order For A Multicolumn Listbox

Dec 9, 2014

I have a 3 column list box in the format:

A1 A2 A3
B1 B2 B3
C1 C2 C3

The rowsource for this contains A1;A2;A3;B1;B2;B3;C1;C2;C3

I want to reverse the order so I have

C1 C2 C3
B1 B2 B3
A1 A2 A3

Which would give a row source of C1;C2;C3;B1;B2;B3;A1;A2;A3

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Multi-table, Multi-criteria: Avoid Repeating Records

Apr 10, 2008

Hi everyone. Apologies if this has come up before, but the search terms I've tried here and on google keep turning up the wrong information.

At work I manage a large database with many tables. It stores data for participants in a research study. Each table stores the data for a different test, so one participant may have multiple records. Primary keys for these tables are defined by a combination of the participant and date of test fields. (Everything is dependent upon a table that stores the static info for participants, so the database is normalized.)

I want to be able to make a table that lists target participants and dates, and then create a query that looks at this table and pulls all the available data from various tables for those individuals that was recorded within one year of the target dates.

I've successfully made queries that meet these criteria while pulling data from only one table. The problem I'm having is that when I try to pull from multiple tables, each with it's own date field that needs to be used as a criterion, I end up excluding almost all the data, because most of the target participants do not have all the requested data within the target dates.

I've tried being inclusive with my criteria (using ORs), but then I end up with tons of data that I don't want and I need to filter through it, which defeats the purpose of the query.

Any advice on handling this issue, or do I basically just need to create a separate query for each table?

I'm sorry if this is too vague, but it's illegal for me to upload any of my own dataset. I could probably come up with an example if it's helpful, though.

Thanks!

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How To Extract Unique Record To New Table And Duplicate In Another New Table

Mar 4, 2013

I have this database that do contains duplicate record (not duplicate field).What I'm trying to do here is to extract record that is unique to a new table And those record that were duplicate into a new table.the *Distinct that we used in sql will not work because it is not what I wanted. using distinc will give me unique record of the whole database.say i have this database that contain an ID:

2525
2658
2658
2658
2525
3678

so what i want is to extract unique record to a unique table and those that contain duplicate in another table.so the 3678 will be put in a new table and the 2525 and 2658 in a new table,,That way I will see which file will have duplicate

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Queries :: Mass Duplicate Main Records And Related Subform Records

May 29, 2014

In my simple database (attached), I need to mass duplicate Tasks and their Notes.

I have three tables: tbTasks (PK: Task_ID), tbNotes (PK: Note_ID), jtbTaskNotes (FKs: Task_ID and Note_ID). jtbTaskNotes is my many-to-many junction table that ties Tasks to Notes.

The main form (fmTasks), bound to tbTasks, has a subform (sbfm_TaskNotes) that displays notes associated with each Task. On themain form,you select which Tasks you want duplicated via a checkbox. The append query (quCopyTasks) will duplicate all tasks that have the checkbox checked. All good there. However, I can't figure out how to also duplicate each task's Notes.

I found Allen Browne's solution [URL] ....., but that only handles duplication of one record at a time, whereas I need to duplicate many records at a time (sometimes 10+ records). How do I go about duplicating multiple Tasks and their associated Notes?

Before you ask "why are you duplicating records?": There are times when tasks need to be re-accomplished and therefore need to have a new record. It's easier to duplicate records than it is to hand-jam everything again.

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