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Append table with duplicate entries

How do I stop duplicate entries in a table from an append query?
How do I get my append query working so it doesn't append duplicates onto an existing table? Currently if I run the append query I get multiples of the same data?


How do I stop duplicate entries in a table from an append query?
How do I get my append query working so it doesnt append duplicates onto an existing table? Currently if I run the append query I get multiples of the same data?


Append Query
I am trying to append to my Ledger credits showing in my downloaded Bank Statements. In my Ledger Table I have set 3 fields as Primary Keys (Donor Number, Amount and Date) as there should never be duplicate entries for all 3 fields.

My append query selects the credits from my Bank Statement and inserts them into the Ledger. But I would expect the use of the 3 Primary Keys to ensure that only new credits are added to the Ledger.

But I am finding that all credits (including entries already in the Ledger)


Duplicate Values
I have a handheld barcode scanner which sends data to a CSV file that is then imported to an Access 2003 database. From the import table, the data is appended to a user table with primary keys set to prevent duplicate data. I use 5 fields to make a primary key. The problem is that we update one field of the five to indicate a process. This changes the data in the user database and allows the original record to be re-imported as a duplicate because that particular field does not match anymore.

I am looking at how best to address this. I do have an autonumber field that I could use to prevent duplicate entries from being imported, but I am not aware of the ability to do 2 successive key check operations on an append query.

My next thought was to append with the duplicates and then do a delete query. I need to keep the record with added data, not the one that will be reimported. Not sure how I could do that query


Create a Query in Microsoft Access to Find Duplicate Entries in a Table
There are many causes for duplicate data: for instance if you have multiple users entering data simultaneously via linked tables, or you might inherit a table with duplicate data already entered.
Running into duplicate data in an Access Database can be quite annoying during the hectic workday, so I decided to write up a technique to help identify the duplicate records so you can manually handle them.


Append Query position
I am quite new to using access and I have a database set up with date, title and event. I have a table with 2000 entries and have created a form to add new entries to the table -- where lies my problem. I have created an append query with each column of the table that references the table and each references the correct combobox/textfield on the form. I have a "submit" button on the form that runs the query with the data entered on the form. After I click submit, a confirmation message comes up and I click yes to run the query. Then a second window comes up that says "You are about to append 0 row(s)" -- which is not my intention.

It's probably a small thing, but I have never used this append function before and am not totally sure how it runs. What do I need to do to make it append the data that it is passed?


How to prevent duplicate entries????
I'm trying to prevent duplicate entries into a movie database. I'm trying to submit actors names on a form, but if their name already exists in my actor table, then how do I have the form tell me they already exist and lets me select that entry that's already in the table? I would like to know how to do this in the Macro builder not SQL


Show and list duplicate entries in table
Hope somebody can help. I want to have the ability to check for duplicate entries - if duplicate, I want all the duplicates to display(list) in a new field.
This is a warranty database and I'd like to see all the previous issues (claim ID's) relating to certain serial number.
I'm very new to Access but I know there's a way of doing it but I just don't know how. I've tried searching for the solution everywhere but I've only come accross articles about removing duplicates which I don't want


append query without duplicate record
I create a append query but every time I run this query records duplicate,

I have a form and a button in form, user type required records in form and then press button, in event click button I have
docmd.openquer "append query"

but every time in table create duplicate records


append query
I'm trying to make a query that will append data from one table into another table. I've done this successfully, however I only want to append entries that have a new update. If a row is the same as it was before, I don't want it to be appended to the new table.

For example: My first table is a list of ongoing projects. One project may have an update added to a field, but another project may not. Right now my query is appending every row to the new table whether or not it is the exact same as it was previously (aka no updates, nothing new).

How do I ONLY APPEND NEW INFORMATION


How to APPEND to a new Table ONLY if it will not make a DUPLICATE???
I have a master table that has a column called "last read date" and a column called "days late". the "last read date" column gets updated everyday depending on some criteria. I have another table (lets call it table 2).

I want it so that rows from the master table will append to table 2 ONLY if the "days late" is more than 4 AND that it will not append if it will make an exact duplicate copy in table 2.


filter table by multiple values
Back in A2003, I could filter a table by the In() function with the table open in datasheet view. A2007 doesn't seem to want me to be able to do that. How do I filter a table by multiple values while in datasheet view to be able to delete some records.

Background:
I get a datasheet in every month that, due to marketing to the same customers in different month, the YTD file I get has duplicate accounts. I have to delete one of the records, but the criteria for deletion aren't something I can query for. This is why I need it open in datasheet view.

My alternative is to make a table out of the duplicate entries, delete those from the original table, then append the cleaned accounts. This seems rather kludgy.

tl;dr How do I filter a table in datasheet view


Read/Write privilege in Form. Also, how to preventing duplicate entries?
I have a database that I would like my employees to be able to populate via a form I created.

Can I limit there read/write ability so that they can only add new entries and not accidentally delete things from the database.

Also, is there a way to make sure they don't enter duplicate data. I.e. Engineer 1 enters information for part number X, but tomorrow Engineer 2 goes to enter same part number X.

If they could see the database table, they could search and see if it had been entered already, but I don't want to give them access to the entire database. Ideally they would just beworking with a form and the form wouldn't allow them to enter duplicate entries in the part number field.


Append Queries
I have a question concerning append queries. I would like to append new records into TableA from TableB without creating any duplicate records in TableA.

I am using a standard Select Query to query data from TableB and then swith to append query to add the data to TableA. This method will copy over all the data, even if it is already present in TableA. I need to filter it somehow to not include redundant data.

The reason I am doing this is because I have a table that cannot be modified by me, and I need to copy that data to a new table to add more fields. I need this table to automatically update when the old table is updated. I think an append query could manage this, but, if there is a more elegant solution, I would be pleased to know


After finding duplicates, how to update row?
I have a large employee table that is appended through 6 queries. After all of the append queries are run, there are tons of duplicate rows.

I want the duplicate rows to be condensed into one row per employee.

When all of the rows are appended, I end up with employees with multiple rows -- but one row has a value for ID1, one row has a value for ID2 and another row has a value for ID3, etc. There isn't a common business rule to indicate when a certain employee would have multiple rows so I can't make the SSN a primary key and have the append reject the duplicate rows.


Append Query with two distinct criteria
I have an append query that uploads external data into a table. It is currently set up for 1 distinct criteria, ie, the CAN number of hardware does not already exist. I've done this byadding the CAN field in again at the end of the append query and use Is Null to filter.

However, I now need to create another table that could allow for duplicate CAN additions depending on the lifecycle of this hardware and therefore need to add a 2nd criteria to stop duplicate uploads.

Therefore, is it possible to have 2 criteria that if both are met, do not append the record, but if only 1 is met, will append the record?

The other field I'm using will be the date the account was flashed. So, what I need to have is where CAN + Date are matched, ignore record, if CAN or Date are matched, add record and ofcourse if neither exist, add record.

Is it as simple as adding in a 2nd field using Is Null for date as well or would this not work?


Duplicate Values in the index, primary key or relationship
Could you tell me what I need to do to get this not to give me an error?

The changes you requested to the table were not successful because they would create duplicate values in the index, primary key, or relationship. Change the date in the field or fields that contain the duplicate date, remove the index, or redefine the index to permit duplicate entries and try again.


Append Values from Query, While Incrementing Foreign Key Value
Is there any way to run an append query that duplicates table values from some fields and increments others, for example:

ID, SynIsDefault, SynID, Tag Value
1, -1, 1, A
2, -1, 1, B
3, -1, 1, C

ID is the primary key field and needs to increment. SynID is a grouping of the Tags that needs to increment by one for all tags. I would like to duplicate all the records and append the data to the table as such:
4, -1, 2, A


Append Values from Query, While Incrementing Foreign Key Value
Is there any way to run an append query that duplicates table values from some fields and increments others, for example:

ID, SynIsDefault, SynID, Tag Value
1, -1, 1, AAA
2, -1, 1, BBB
3, -1, 1, CCC

ID is the primary key field and needs to increment. SynID is a grouping of the Tags that needs to increment by one for all tags. I would like to duplicate all the records and append the data to the table as such:


Before Update Event
I found some code on the Internet that I thought would help me with duplicate entries in my database. I have it entered as a before update event in a form field. The warning box works when I enter and duplicate entry but the duplicate record is not pulled up for editing afterward.