Tables :: Allow ONLY Duplicates In Two Fields
Apr 17, 2013
I have created a database which holds architectural drawings for my company. The drawings have a number (dwgNumber), a name (dwgTitle) and a revision (dwgRevision). Each number should only have one title but cannot be unique as they can have several revisions. I am looking for a way to allow the users of the database to only enter a drawing title for a drawing number once. This is because if more than one person is accessing the front end at a time, they may use the same drawing number for different drawings.
For Example:
----THIS IS FINE
Number: A001 Title: Drawing 1 Revision: P1
Number: A001 Title: Drawing 1 Revision: P2
----THIS IS NOT OK
Number: A001 Title: Drawing 1 Revision: P1
Number: A001 Title: Drawing 2 Revision: C1
Basically, each number can only have one title assigned to it.
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Oct 12, 2012
I am trying to modify an inventory management database. I want to prevent duplicate entries to specific fields in centralized table. The table is called Work Stations. Its function will be to track various computer equipment by a specific work station name. Each of the items will have a unique asset tag.
The primary Key for Work Stations is WS-ID. The fields I am trying to prevent duplicate entries in are WS-Computer, WS-Docking Station, WS-Monitor_1, WS-Monitor_2, and WS-Switch. Each of those fields are primary keys in 4 different tables that conation more detailed information about item. The exception is WS-monitor_1 and WS-Monitor_2 have a one-to-many relationship with Mon-Asset Tag in the monitors table.
The goal I am trying to accomplish is when a work station ID is created or modified duplicate entries are prevented to those fields listed above. The computer, monitors, docking station, and switch fields in the work station table may contain data or may be null.
I have tried to set the Indexed Option to Indexed (No duplicates) for each of the fields and I have also tried setting Yes to Ignore Nulls in the index option on the table design tab for the individual fields. Both options have returned the same error stating the changes would create duplicate values, in the index, primary key, or relationship.I have not created form for this table yet as I was trying to get no duplicates option to work first. I have verified the data and the only duplicating fields are the Null fields
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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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Dec 23, 2014
I've been playing around with a new database design and ran into a possible 'error' that I would like to avoid.
It's going to be a payroll database to store time codes for hours spent working on specific projects. I have been struggling on how to put this together to fit with what we've been doing for years and I think I hit a few breakthroughs this morning.
However I want to avoid this error of possible duplication of entry.
Simple table set up - primary key is just a running integer; Employee ID; and Week Ending Date.
I can have multiple week ending dates for a specific employee; but I want to avoid having the same employee with the same week ending date. I cannot set up either field as being unique.
Quick run of data that would be in this table:
Code:
1 ABC 11/21/2014
2 ABC 11/27/2014
3 ABC 12/07/2014
4 DEF 11/21/2014
5 DEF 11/27/2014
6 DEF 12/07/2014
7 ABC 11/27/2014
in this example, when the last row is entered I need to get a popup or some warning that this time has already been entered.
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Apr 17, 2013
I have created a database which holds architectural drawings for my company. The drawings have a number (dwgNumber), a name (dwgTitle) and a revision (dwgRevision). Each number should only have one title but cannot be unique as they can have several revisions. I am looking for a way to allow the users of the database to only enter a drawing title for a drawing number once. This is because if more than one person is accessing the front end at a time, they may use the same drawing number for different drawings.
For Example:
----THIS IS FINE
Number: A001 Title: Drawing 1 Revision: P1
Number: A001 Title: Drawing 1 Revision: P2
----THIS IS NOT OK
Number: A001 Title: Drawing 1 Revision: P1
Number: A001 Title: Drawing 2 Revision: C1
Basically, each number can only have one title assigned to it.
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Oct 15, 2004
Is there any way I can stop the same permutation of three field values being duplicated in a table.
eg
a - b - c is ok
a - b - d is ok
b - c - e is ok
a - e - c is ok
a - b - c ......duplicate
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May 16, 2005
Sorry for the question's wording.
Here is what bugs me:
- I have one table tblRefctc with the followings fields :
LCtcRef,../..,LRefServ0, LrefServ1,..LrefServ16.
Where all those Lref are long; LCtcRef being the primary key. This table describe a contact from different branches (account, etc..) so while each branch has the relevant information about this contact, they know that that branch too is in contact with the same person.
- I have this other table with describes Events, TblIdxEvt (meeting, whatever) :
LRefidx,IdxEvt,IdxCtc
where IdxCtc is filled with LCtcRef once an event is created.
What I must check for is : For the same IdxEvt, should another branch makes an appointement for LCtcRef (i), I must check if one of the LRefServ0 to LRefServ16 are not already added in the event table.
At this time, I am stuck with making functions which test the existence of the LRefServ(i) (i ranging from 0 to 16) in tblIdxEvt, but I wonder if there is a simpler way to do it with SQL (which, as you could guess, Im not good at).
Thanks in advance for any pointers.
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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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Jan 30, 2008
Hello,
In access 2003 i have an external Oracle table named EXT-COM_EXTRA_DATA_FIELDS
in this table I have the following fields: COM_DATA_KEY, COM_DATA_FIELD_NO, COM_DATA_VALUE
From this I have created a query named: LOOKUP-BARCODES-10 this looks at the above table by filtering the
the records on the field: COM_DATA_FIELD_NO where this =10.
Also I have created a second query named: LOOKUP-BARCODES-20 this looks at the above table by filtering the records on the
field: COM_DATA_FIELD_NO where this =20
Below is sample data in the table:
COM_DATA_KEY; COM_DATA_FIELD_NO; COM_DATA_VALUE
009A/s 10 03010303165001
009A/s 20 04350309115002
010B/P 10 05150909116001
010B/P 20 06150909116002
011C/X 10 07281809217003
011C/X 20 N/A
The problem is i would like to combine the numbers in the COM_DATA_VALUE field for the same product (ie the same COM_DATA_KEY
record) on the same rows without any duplicate records as shown below:
COM_DATA_KEY; COM_DATA_VALUE; COM_DATA_VALUE (2)
009A/s 03010303165001 04350309115002
010B/P 05150909116001 06150909116002
011C/X 07281809217003 N/A
As you can see from above some records only have data in one COM_DATA_VALUE (like 011C/x) where COM_DATA_FIELD_NO = 10 but no
data for the same product where the COM_DATA_VALUE = 20.
Im thinking maybe i can create a new join query that looks at the above two query’s and combines the values in the COM_DATA_VALUE for
the same product onto the same record row but im not sure how to go about this without creating duplicates & its been some time since ive done joined queries. Any help would be great?
ive attached a cut down version of the database with the table imported from oracle rather than being linked to oracle if this helps.
Thanks
Kevin
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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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Nov 10, 2013
I'm getting back into Access after retiring and about 10 years of isolation (from Access). I have 2010 version and know that one should avoid duplicate entries and a way to do this is make those fields unique key fields. I have a Customers table and have bounced back between CusID (AutoNumber) and Compound Keys (CusFName and CusLName) as the key fields. The compound keys prevent duplicates but become very hard to work with later in code and expressions. The CusID is preferable from that standpoint, but can't prevent inadvertent entry of duplicate names.
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Jan 7, 2015
I have a report to run that gathers info from three tables. If I make individual queries to get the information I need the three queries gather the correct information. If I make one query it makes duplicates. If I combine the three queries that work the main query mixes up the information and duplicates it. How do you make a query that gets information from three tables and not have it be garbled?
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Oct 15, 2013
How to prevent duplicates on the combination of two fields - text & numeric?
I'm currently using the code below that warns users when the combination of two fields have already been used. (Combination of the TWO fields has to always be unique so if used again will warn the user)
Works well when both fields are numeric but fails when the JobDetails field is changed to text in the main table (tblPPMPLanner)
Code:
Option Compare Database
Option Explicit
Private Function IsDuplicateRecord() As Boolean
On Error Resume Next
Dim PreviousRecordID As Long
IsDuplicateRecord = False
[Code] ....
The field that should be a text field is called "JobDetails"
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Nov 2, 2014
I have a client database that has recently had multiple duplicate entries. I need to reduce or negate this erroneous activity. I have a client table where I record amongst others, the following;
key
[christian_name]
[family_name]
[dob]
......
I believe that to prevent duplicate entrie via form I have created an additional field called "unique" given it as a unique index which I want to have populated with the joined fields first_name & last_name & dob (IE johndoe01/01/90), and then as user enters a new client it wont allow a duplicate.
However I need to fill all the existing customers (3600+) with the relevant joined existing data. If I create an expression I can cajoin the fields in a select query but when I try to make an update query the same syntax comes up with empty fields.
select query sql that worked to show field ...
SELECT divers.christian_name, divers.family_name, divers.dob, [christian_name] & [family_name] & [dob] AS Expr1
FROM divers;
update query that was empty ..
UPDATE divers SET divers.[unique] = [christian_name] & [family_name] & [dob];
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Apr 3, 2006
I think this is an easy one...
I have two tables - one is a Master. I want to delete the records in the Master if they are in the second table. Here's my SQL and I can't get it to work:
DELETE from TestMaster
INNER JOIN on JoinedDupList
ON TestMaster.ID=JoinedDupList.ID
WHERE JoinedDupList.ID = TestMaster.ID
I'm being told I need to define the table to delete from... I thought I defined it.
Thanks!
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Oct 19, 2013
I am trying to combine two peculiar tables in Microsoft Access and have been unable to do so even after doing a lot of brainstorming and searching on the internet.
The two tables are spend and export
Spend
+-------------+--------+-------+-------+
| Country | Metal | Month | Spend |
+-------------+--------+-------+-------+
| China | Iron | Jan | 100 |
| China | Iron | Feb | 200 |
| China | Iron | March | 300 |
[code]...
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Aug 20, 2007
Ok.. I have been racking my brain for hours trying to figure out how to do this. Maybe someone here can help me figure this out.
I have 2 tables. "AR94" & "RPIN"
I need a query to look at the "Provider_PIN" field of both tables in order to find duplicates between that field in both separate tables at which point I need it to say If a duplicate provider_pin exists in the AR94 table & the RPIN table Then remove that provider_pin from the "RPIN" table.
The final result should be that the only records showing in the "RPIN" table would be those provider_pins' that were NOT found in both tables.
Starting Example (Before query):
AR94 Table:
-----------
1234
12345
123456
1234567
12345678
RPIN Table:
-----------
1234
4567
45678
12345678
456789
Results that should be achieved (after running query):
RPIN Table:
4567
45678
456789
Thereby deleting the 1234 & 12345678 values from the RPIN table leaving only records that were NOT found in both tables.
Please help me as I am trying to get this done for a project and can't figure it out..:confused: Thanks.
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Dec 13, 2007
Hello,
I am just starting Access...
Or at least trying to learn it on a small project, and I need a jumpstart, if someone woild be so kind and help me out.
I need to organize my e-mail sendings.
In one table (Table Sent) I have e-mail addresses where I have already sent messages.
In an other (Table New) I have some other e-mail addresses, I am preparing to send out.
To make sure to not send mail to those who already got one, I need to compare the two tables, and delete from the Table New those addresses which are already present in Table Sent.
I guess that would be a 2-3 line SQL script...
All of my attempts so far produced no results
Any guidance would be great!
Thanks
Attila
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Feb 6, 2014
Attached is my many to many relationship setup. I would like to prevent the possibility of entering the same person more than once for the same training event. I am assuming that I do this by setting an index setting for a field the junction table?
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Apr 24, 2013
Employees submit information into a form which translates the information into a table. The table has been in use for years. By accident some employees were writing to an archived table while others were writing the the active table. This resulted in a field called "WorkID" being duplicated across the two tables.
Bottom line I am trying to write a query finding duplicates across tables but basing the duplicate only on certain columns.
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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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Feb 27, 2014
We are a non-profit that does blind mailings for our membership drive. The company who we buy names and addresses from sends us a delimited file that has these fields as the headings
" ID, FULLNAME,COMPANY, ADR1, ADR2, CITY, STATE, ZIP, FIPS"
Once they send out the mailings, people then send in back a remit slip with a contribution that gets scanned through a program that creates a file that gives us these titles
"ALT ID, AMOUNT PAID, RUN DATE, TENDER, FUND, PURPOSE, SOLICITATION, MEMBERSHIP QUESTION, MEMBER TYPE, CONSTITUENT TYPE, SEGMENT"
The "ALT ID" and "ID" are the same in both tables.
I need to find a way to merge the tables and combine the fields that have the same ID # , and then have it create a csv file that reads like this (see below) for only the files of the people that responded so that I can import it into our membership software.
"Alt ID","Title","First Name","Middle Name","Last Name","Suffix","Address1","City","State","ZIP","ct y_code","Amount Paid","Run Date","Tender","Fund","Purpose","Solicitation","Me mbership Question","Member Type","Constituent Type","Segment"
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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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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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Nov 18, 2013
Basically in my order details table i have the following fields
Product
Unit
Size
At the moment i have the Product field with a dropdown that gives me all the products from my ProductT. But once i choose the correct product in the unit field it gives me all the possibilities of every product not just the units associated with that product. ie
ProductT
Grasshopper Box1000 Adult
Grasshopper Box1000 Subadult
Worm 10pz Big
When I select the grasshopper product and move on to the unit field i also get "10pz" option but this is not a product available.
How do i set up validation of the fields Unit and size based on another fields data?
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Aug 15, 2013
I reached the limit of 255 fields in a table. I just need to add one more field so I deleted several fields I no longer needed thinking I would then be able to add one more new field. However, I am still unable to add one more field. How to free up fields that are no longer needed?
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