Comparing 2 Tables To Find Duplicate Values
May 9, 2006
Hey all
Im rather new to access but have to use it at work. Ive been asked to see if there is a way to delete duplicate records from a table.
Now, I have 2 tables. The 1st table (tbl_list) contains records of various customer details. This list is old.
The second table (tbl_new_list) contains new customer details.
We have found that we have the same customer details in tbl_new_list that are in the old table.
Im looking for a way to compare these 2 tables so that the values in tbl_list are not in tbl_new_list.
I have tried numerous methods using append queries but nothing seems to work.
Thanks in advance people
P.S the data will be compared through a telephone number.
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Apr 10, 2015
Someone fills in a new patient into the database, and the 'chipsoftnummer' which is the number in another database. That number is unique, so i want to have it where if someone fills in a number that already exists in the database the afterupdate event will open that record in the form.Here's the code i put in the input textbox update field:
private Sub chipsoftnummer_AfterUpdate()
Dim NewCHIP As Integer
Dim stLinkCriteria As Integer
Dim custNo As Integer
[code]...
It doesn't work, simple things like hello world do work so VBA is enabled.
I've attached the corresponding part of the database (took out all non-relevant fields and tabs) .
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Aug 14, 2013
How to control the below message to something like this through VBA:
"The Job: " & JobNumber & " already exists in the table." or to open an alternate form where they can make the change. Allowing duplicates is not appropriate for what I am trying to accomplish. I just want a friendly way of rerouting a user to understandable answer.
instead of this:
"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 data in the field or fields that contain duplicate data, remove the index, or redefine the index to permit duplicate entries and try again."
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Jun 11, 2013
I've got a table which lists accounts with an associated charge. If the account has multiple charges, then the account appears multiple times, for each charge. I'd like to consolidate the duplicates without losing each charge that is associated with the account.
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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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Dec 30, 2013
We are working on an Access (2007) database that is on a SharePoint Site (2007).
Currently the form is operational, but there is one last thing that would be nice to have.
The table is "Updated Headcount" which contains "EMP_ID" which are unique numbers stored as text.
In the event a new employee is entered in the system by another user on this site we would like to prevent any duplicate "EMPID"s from being entered and saved on the SharePoint, we would also like to alert the user and prevent the data from being saved.
All data is currently bound, so once the user makes a change it is made, no submit button is required.
We are running into some difficulties in doing a dlookup from the value entered and comparing to a column in the table.
TABLE - UPDATED HEADCOUNT
COLUMN in UPDATED HEADCOUNT - EMPID
FORM CELL user will input an EMPID - newEMPID
FORM CELL used for a dlookup to compare what user has entered to what is already in the table - duplicateEMPID
So below is what we are trying to do, we are sure there are a few commands missing....
=IIF(newEMPID=dlookup([UPDATED HEADCOUNT]![EMPID]), newEMPID, "Error, EMPID already exists")
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Oct 28, 2007
i want to know if it is possible to compare values (a string) stored in a field with a field of another table?
for example, i have a table named Courses, it has field Course ID...and Course Requirements.
the field Course requirements can accept only 3 value: A,B and C.
i have used a combo for this.
then, i have Student qualifications table. i have also designed a form to input student qualifications.
my problem is that i have to compare qual. of students with the req of the course, to allocate them a specific course. if both values meet, the db automatically allocates the course to the student.
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Dec 7, 2007
Okay I have a query that pulls from a table. It's pretty simple - nothing big.The query will be used to correct information in some sales tax data.I have 3 colums with sales tax info, and they should all be the same. I want to compare each column to show only those which don't match each other.NetTax, TotalTax, and TaxB are the fields.In the query, for the criteria of NetTax, I put in:<> [TotalTax]When I run the query, I get results, but they are all equal.EG:4.35 4.35 4.35I don't want them to show, and not sure if that's the right way to go about it or what.If I run without that criteria, I get 21,600 results.With that in the criteria, I get 304 results. So it is working somewhat...but for whatever reason some don't seem to be seen as being equal? I don't get it. Data type is number and they are formatted the same way.
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Dec 17, 2007
Hi...
I will try to keep this succinct.
I have a query that totals a column in a sub-form. The query also gets a sum from the main form for the same record. Is it possible to have a message/colour change/warning if the total of the column in the sub-form exceeds the other number in the query? I would need this comparison to take place within this query, rather than creating a new one.
Thanks!
Kathryn
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Sep 10, 2006
Hello everyone! I've found much use of this forum recently as I am working on a database concerning my work.
I'm not a newbie working with access but this problem seems confusing at the beginning.
I've got 2 tables
1) Information about produced details. Article, Mass etc.
2) Mass constants
Mass min. Mass max. Constant
What I need, is to build a query that compares the mass of the detail with the range mass min. and mass max. and shows the mass constant that the detail belongs to.
Has anyone tried to solve this kind of issue before?
Greets from Estonia,
K
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Jan 20, 2014
I'm doing a bank-rec database, so on the one hand I'm comparing positive debits, to negative credits. How do I query to get, say, "Bank1 -$1000, Bank2 $1000"
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Jul 10, 2013
I have a table [VL] with four fields, [vl_id], [product], [vl_date], [valeur_liquidative].
The idea of the table is that you can input and update the value of each product on a given day.
I need to find the difference in days between successive dates (vl_date) each time that a product value (valeur_liquidative) is updated. Values aren't updated everyday as it is not updated during the weekends. I have had a go at this but have struggled..
A picture of what the table looks like is attached for reference.
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May 15, 2013
I have one field where string contains several words separated by semicolon and my goal is to be able to remove duplicates within the string and keep only unique values. Here is an example:
initial field:
xxx;yyy;ppp;yyy
targeted result:
xxx;yyy;ppp
How this could be achieved ?
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Jun 18, 2013
I'm trying to determine the SQL to return only those records in a table which have duplicate values in each of two fields, but different values in a third field. Here's an example:
Code:
AcctNum FoodType FoodClass
------- -------- ---------
A123 Apple Fruit
A123 Apple Fruit
A123 Grape Fruit
A456 Potato Vegetable
A456 Potato Perishable
A789 Carrot Vegetable
A001 Banana Fruit
For the above table, I'm trying to return records which have multiple entries for AcctNum + FoodType, but DIFFERENT values for FoodClass. So for the above table, the query would return:
Code:
AcctNum FoodType FoodClass
------- -------- ---------
A456 Potato Vegetable
A456 Potato Perishable
It returns these two records because there is more than one record with for the AcctNum + FoodType (i.e. 'A456' + 'Potato'), but DIFFERENT values for FoodClass (i.e. one record has 'Vegetable' while the other has 'Perishable').
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Oct 24, 2006
Okay,
I have 33,099 records in a query, that i'm importing into a table. (don't bother witht he semantics, it's from a linked dbf file)
The table does not have a primary key. Given Three Fields (out of 74):
Item_ID
Title
AltTitle
With the table populated with all the records, I highlighted those three fields in Design View of the table, and told told access to make all three of them the Primary key. Upon attempting to save the table, I got an error message saying that data in the table violated the primary key unique fields rule or what not.
So I wanted to make a query to determine where the error occurred. I could not off the top of my head figure out how to select only the duplicated records in a table, so instead, i figured if they violated the Primary Key unique field rule, there should be duplicate entries. so I did this:
select distinctrow item_id, title, alttitle from tbl_Table;
I got 33, 099 records returned on the DISTINCTROW. Strange as that was, I deleted all the records from the table, set the primary key as I wanted it, and then repopulated the table via my sql insert into commands. This time the table reports only 33,093 records, meaning 6 records somehow violate the primary key unique index, but don't violate a DISTINCTROW call. How can i find them to determine how they are violating the primary key unique index?
thanks
Jaeden "Sifo Dyas" al'Raec Ruiner
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Aug 17, 2006
I have two tables: -
1) Sales data
2) Claims data
I want to anaylse Premium (contained in the Sales Data Table) against Claims (contained in the Claims Data Table). The result I want to achieve is to show a loss ratio (Premium / Claims as a %). I need to show this on a per policy basis (each Table has a Policy Number Column).
Im new to Access and do not know how to go about this.
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Jul 12, 2005
Hi,
I have imported data from an ERP system into an Access table. This big table contains information about invoices processed last month. 2 of the columns are currency code and payment batch code.
Actually, there are rules that accountants should follow, but they can make errors. We would like to find those error using this Access database.
One rule is that only predefined payment batch codes should connect to a
currency code.
My idea was to create another table, where controllers are able to type in these rules like
EUR CIE
USD CIU
HUF BKH
This table has only 2 columns: currency code and payment batch code and no primary key has been defined.
The 2 tables were joined with the currency code and a query printed only those transactions where the payment batch code from the big table <> the payment batch code from the new table. This shows where accountants made an error.
This is the query:
SELECT [475 Master].*
FROM Tbl_Pmt_Btc INNER JOIN [475 Master] ON Tbl_Pmt_Btc.Cur_Code2 = [475 Master].Currency
WHERE ((([475 Master].Pmt)<>[Tbl_Pmt_Btc].[Pmt_Btc_Code]));
475 Master is the big table, Tbl_Pmt_Btc is the new table that can be modified by the controller.
This worked until more than one payment batch code were assigned to a currency code.
EUR CIE
EUR CIU
It seems that Access can use only one of them.
Can you please advise what to do in order that Access takes both rows into
account and the query prints those transactions booked in EUR where the payment batch code are neither CIE nor CIU.
Is there a simple solution without any programming?
Thanks,
Peter
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May 17, 2005
Hello - I am new to Access and don't know VB.
I am trying to compare 2 tables that each contain the following information:
Fields:
Document Number
Date
Changes (Amendments, etc.)
I would like to see the following on a report:
A - If a document number is on Table 2, but not on Table 1, show these on a "missing documents" report.
B - If a document number exists on both reports, however the dates do not match. Example: Document 123 is on Table 1 with a date of 1/1/1999 in the date field. Table 2 contains the same document in the document number field, however the date field contains 2/15/2005. SHow these on a "Date Differences" report.
C - If a document matches on number and date, however the changes field does not match.
Ultimately, I would like to add other fields to compare as well.
Hope this makes sense to someone out there!
Thanks!
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Dec 24, 2007
Hi Guys,
I have made a database for a mobile phone retail store. The purpose of the database is to sort out network (e.g. Orange, AT&T) payments and compare them to our records. Our manager will enter in details into one table, including the different commisions that should be paid, plus the phone number. The other table is an imported spreadsheet that the commisions from the networks are shown. For each table, I have totalled the commisions.
My next step is to compare the two tables against the phone number, and commision totals, so that deals that have not been paid, or underpaid are highlighted. I know this involves a couple of loops, but my knowledge of Access does not go that far.
I have been thinking that I need to write code that gets one number in the first table and compare it against ALL records in the second table until it gets to the one with the same number, compare the values of commision total, and move on to the next record.
Can anyone help?
Cheers!
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Aug 22, 2011
I need to create a query that will compare both tables and just send out the records that dont match to a report.
Table1 asset#,Serial#
Table2 asset#,Serial#
query that checks that in Table1 the asset OR the Serial match the what is in Table2. and if it does not find a match to send it to a report.
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Jul 24, 2007
Hi, I have a cross-ref table (called MFC_CIBC_XREF) which links a bank account to a fund number and a general ledger number. It should be a unique relationship, wherein (the "=" means corresponds/links to)
Bank Account # "=" Fund #
For each bank account, there are sometimes multiple currencies being used, so each currency then links to a general ledger account, such that
Bank Account #.Currency = Fund #.General Ledger #
Sorry, if that's kinda cryptic, but here's an example:
Bank Account - ABCD123
Currencies operated in - CAD, USD
Fund # - F30
Based on the above, ABCD123 "=" F30, and including the general ledger numbers, ABCD123.CAD "=" F30.100, ABCD123.USD "=" F30.8121.
Basically, it's a way to keep track of not just the transactions for a particular bank account, but for the transactions in a particular currency.
Anyway, as I said, it's supposed to be a 1-to-1 relationship: each BankAccount.Currency should correspond to 1 and only 1 Fund.GeneralLedger. However, there are some entries in the table which have each BankAccount.Currency corresponding to multiple General Ledger numbers. Using my example above, ABCD123.CAD has two records in the table, one corresponding to F30.100, and another corresponding to F30.8101. This was probably because F30.8101 used to be linked to a different bank account, that got merged (ie, it might have been linked to ABCD124.CAD that then got merged into ABCD123.CAD).
Now I want to run a query on MFC_CIBC_XREF and find all the records where for each BankAccount.Currency, there is more than one Fund.GeneralLedger. I don't really know that much SQL, and even in Design View, I'm not sure of the statements to use. Any help is much appreciated.
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Sep 12, 2007
Hi
I have a customer database and would like to merge anyone who has the same
phone number or mobile number.
The table is
First name Last name Phone Mobile Email
John Smith 123
Mary Smith 456 123
So I want to find these Mr&Mrs Smith because John phone number is the same
as Mary's mobile
Can you help??
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Jun 15, 2013
I am trying to manipulate a find duplicates query using the following criteria:
Fstnm L2, Lstnm L5, Add1, Zip
This is what I have done so far:
SELECT [Duplicate Identification Dataset].[FSTNM], [Duplicate Identification Dataset].[LSTNM],
[Duplicate Identification Dataset].[ADD1], [Duplicate Identification Dataset].[ZIP],
[Duplicate Identification Dataset].[ID], [Duplicate Identification Dataset].[MIDNM],
[Duplicate Identification Dataset].[SPFSTNM], [Duplicate Identification Dataset].[SPMIDNM],
[Code] .....
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Feb 14, 2007
As part of my job I am constantly comparing files from a production environment against those from a UAT environment. The checks are generally the generic before I reconcile the monetary values I check that the static data population is the same. Basically I import the files into access and then do a like for like comparison on the number of blanks per field. Eg.
Field Blanks_UAT Blanks_Pro Diff
Coustomer_Number 10 2 8
Is there any way of doing this programmable so I can reuse it or are there any tools out there that do this work for me. Some of the files contain a large number of fields so the work can become rather cumbersome!
Any help is appreciated
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Feb 28, 2007
Hi guys, i'll try and explain this as best i can....
I have 2 tables:
CurrentMonth
PreviousMonth
Both tables hold financial information by policy number. What i am doing is working out financial movement on a month on month basis. For example, if in previous month the financial position was £100 but in current month the finances had moved to £150 then the movement is £50 for the month. This i can do no problem by linking the tables by policy number and extracting the financial position and subtracting one from the other to give me a movement. However, in some instances there will be some policies that appeared in PreviousMonth but have since been cancelled back to policy inception so is not appearing in CurrentMonth.
Problem: I need to be able to bring in the policies on the previous month that are not appearing on the current month (due to cancellation).
Can anyone help me?
Cheers
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Mar 22, 2006
I'm trying to write a report which initially I didnt think would be hard to do, but when it came time to write the underlying query I realized it was a bit above me.
I cant give away too much of the database structure here, due to legal issues, so sorry for being vauge. Hopefully I can give enough information that someone can get me started.
I have three tables that will be used in this query. One is called NAMES and has all of personal details of contacts. The only fields that are needed from this table are the primary key and citizenship field.
The other two tables are virtually the same, and they are the two being compared. One is REGISTRATION and the other APPLICATION. Essentially what I want here is to be able to compare the number of who applied to the number who actually registered.
Here are the pseudo-tables to give you a better picture:
NAMES
nID
FName
LName
DoB
Citizenship
REGISTERED
programCode
startDate
endDate
nID (foreign key)
APPLIED
programCode
startDate
endDate
nID (foreign key)
I've tried a few different approaches which worked in my head, but when it came time to run the query the results were different. Any suggestions on how I should tackle this?
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