Tables :: How To Create A (unique) Field
Nov 12, 2012
I have a table as followed;
EmployeeID: PK
FirstName
MInitial
LastName
Company:FK
Department:FK
What I want to do is create a new field that automatically populates based on what is entered into the above fields.
Essentially creating a single field with unique data generated by multiple fields.
For Example if I entered the following informaiton:
EmployeeID: 1 (AutoNumber)
FirstName: John
MInitial: P
LastName: Doe
Company: FederalGov
Department:Test
The new field can be generated as followed: JohnPDoeFederalgovTest
What i plan on doing with this is making this "generated" field an index so no new duplicated records can be added.
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Sep 20, 2013
I have a table - (Table A) that has 2 fields X and Y. I would like to write a query or script to make two new tables based on the unique values found in field X. In other words, all data where field X = 1 would be written to a new table called "1" and all data wehre field X =2 would be written to a new table called "2".I would like this done automatically.
Table A
Field X Field Y
1 a
1 b
1 c
1 d
2 a
2 b
2 c
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Jul 23, 2015
Is there a way of merging 2 fields together to create an additional field
my database consists of 4 main tables (in order of relationships)
*HeadOfficeDetails
*SiteDetails
*ContainersOnSite *Contracts2015-2016
For example;
Account Reference: TEST
Site Number: 001
and the field i would like to have;
Site Reference: TEST/001
I would also like that when i add a new site to that account i will have TEST/002....
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Nov 14, 2013
How i would best combine values in a table to produce a 'primary key id number.'
For example: the first letter of a city in the ID and the next number available/auto number - Portsmouth -> P233
I know i can create this in a query however i want it as the unique ID for that record entry in a table. If that doesn't make sense i can try to elaborate some more.
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Jun 18, 2015
I want Access to automatically generate a reference number for a record based on the values in on two other fields for a given record using a form.
The first field is called Operation Number.
The second is Bag Number.
The reference number needs to be in this format: 19C.3.1
Where 19C is the Operation Number, 3 is the bag number, and 1 is automatically generated. Additionally I need the last number --the automatically generated one--to go back to 1 if with each new bag number.
This is kind of like library catalog numbers. Not sure how to do this.
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Dec 13, 2013
I have downloaded a contact template from the internet ready to go. There are few things I need to get rid off and make changes to.
One of the most improtant thing is making one of the field unique. For some reason, i can get to the design view. I open navigation panel and right click on the table, there is no such thing call design view on the menu.
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Feb 8, 2015
I have 4 fields in a table that when combined must be unique.I know you can setup multiple fields as a combined key, but I don't really need these to be the key (I will auto number a unique key). I just need to make sure the same combination of codes is not entered twice.Do I set this up as multiple key fields anyway?
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Mar 5, 2013
To prevent duplicate records, I use multiple fields indexes, which worked fine until now. I learned that each "empty" fields are consider unique by Access, so not the best in an index to prevent duplicate records. I managed to have it worked using the default value property to give each "empty" records the same value.
Now my problem is that I have a date field which is optional, but I need to use it as a unique identifier in an index. I could again use a default value, but since it has to be a date, I find it confusing. I would rather have a default value of "No date specified" or "-" or even better, "". Unfortunately none of those works with date fields.
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Oct 8, 2013
I am trying to create a one-to-many relationship between these two tables. I want to be able to access the 3 fields on the [Processors] table within reports based on [AllItems]. [AllItems] is a listing of account activity where the [AccountNumber] repeats. I have every field set as the "Primary Key" on [AllItems] as that is the only way to avoid importing duplicate data. I am getting the error: "no unique index found for the referenced field of the primary table"
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Sep 5, 2013
I'm trying to create a table for every record I have in a field. I have two tables, one titled "Experiments" and another titled "Students". I want the new tables generated from the field EXP_NAME from Experiments. I need it to have seven fields, one copied from Students, five labeled Trial1 thru Trial5, and a final for a grade.
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Jan 17, 2007
Hello i want to create a tracking number based on information entered into a form.
So i have my main table called "MainData" and this is in the backend and linked through to the front end where my form is.
I then have a query which is called "calllog" which has a field called "Call Number" inwhich i placed the following
=Year([Date]) & Left([CustomerName],3) & Right([Date Created],2)
This then gives me a unique number. Once i have entered a job in it will generate a number. Now this part works fine but it does not update the Maindata. How can i get the this to transfer the data to the maindata table???
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Aug 22, 2006
Hi All.
Is there a way to index and create a unique identifier using a combination of fields (eg. User# + Provider + Date)?
Thanks.
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Dec 22, 2012
I have a form with a combobox where I select the Carrier witch then populates a multiselect listbox with all the record from that carrier in the specified date. When I select them and click save I want all the record ID(ConID) saved under the same ID(manifest ID) ie,
1 223
1 225
2 344
2 4444
Ect
It saves it in a table called Manifest With the fields Manifest ID and CONID which is a lookup field to a different table. Here is my current code for the on click command
Code:
Dim db As DAO.Database
Dim rs As DAO.Recordset
Set db = CurrentDb()
Set rs = db.OpenRecordset("Manifest", dbOpenDynaset)
[Code] ....
Now I've done some searching and I thin dmax is what I want to use.. But I am not sure how to make it work...
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Apr 4, 2013
So I have this field in a form/table called "CustomerID". This is to be an ID number for our customers that includes the first four letters of their last name (LastName field) followed by four digits.
This ID is created when a button is pressed in the form. After that, code needs to grab the first four letters of the last name (LastName field in the form and table) and then go to the Contacts table and see if there is already a CustomerID that starts with those four letters. If there is not, then the CustomerID will be those four letters followed by "0001". If there is, it needs to be those four letter followed by the next number sequence that still does not exist for those four letters.
For example:
First four letters of last name = zabo
Check to see if those four letters exist in CustomerID returns negative then
CustomerID assigned = zabo0001
Another example:
First four letters of last name = zabo
Check to see if those four letters exist in CustomerID returns zabo0001 and zabo002 then
CustomerID assigned = zabo0003
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Jun 18, 2014
I'm trying to use DDL to add a DATE field as above with NOW() as the default value..
I am using the same syntax pretty much (Altering instead of Creating a table), but its not working..
The error I get is:
err.number = 3293
err.description = Syntax error in ALTER TABLE statement.
Code:
CurrentDb.Execute "ALTER TABLE MyTable ADD COLUMN RecordCreatedDate DATE DEFAULT NOW()"
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Apr 12, 2013
I am trying to create an automatic unique 'number' (actually text) in a form. Here is an example of the format...
1456.R1
1456 is the project number
R stands for revision
1 is the first revision
So, in this database there could be 1456.R2 etc. but there could also be other project numbers, say 2323.R1, 2323. Looking for expression I need to enter to have Access look up the last revision for a specific project and then add 1 to it?
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Oct 6, 2012
if I got a 4 x 4 matrix table - 4 rows and 4 columns - MS Access 2007/2010 the values should exist as below with no repetition of any number in any of the cells.
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
a number should not repeat in any of the cells.I set a primary key on cloumn 1 and defined unique on all the fileds but that doesn't work since 1 columns does not know what the other cell contains and no relationship exists.
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Mar 6, 2014
I am trying to take a table that looks like this:
Customer Name
Fruit
Customer A
Apples
Customer A
Bananas
Customer B
Pears
Customer B
Apples
Customer C
Pears
And create a table that looks like this:
Customer Name
Apples
Bananas
Pears
Customer A
Apples
Bananas
Customer B
Apples
Pears
Customer C
Pears
I think this is relatively simple but don't know the syntax to create this table.
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Mar 25, 2014
I want to create a field validation rule that requires the user to input a policy number in a standard format. The format has a fixed length of 13 with three underlying components. The first 3 digits identify coverage, the next 7 are the policy number and the final three must always be "-00".
Example: GLO1234567-00
Is it possible to create a validation rule for this ? If so, can you provide the code based on the simple example above ?
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Feb 6, 2013
I am wondering if it is possible to automatically create a new field in one table whenever a new record is entered in another table. The name of the field would be the primary key entry of that new record.
I have one table (table 1) in which each record corresponds to a particular mouse with a unique ID number, and each field is the ID number of a particular genetic marker. The table overall shows what genotype (+ or -) a mouse has at each marker.
In the other table (table 2) the primary key of each record is the ID number of a genetic marker, and the fields are several different bits of information about the marker (e.g. what chromosome it's on, its location on the chomosome, etc.)
I would like to have it set up so that if I enter a new genetic marker in table 2 a field named after its marker ID will automatically appear in table 1. Is there a way to do this?
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Jan 1, 2013
In Access 2010, I'm creating a table with a rich text memo field.
I name the field (BugDescription), select "Memo" as the Data Type, and from the Text Format dropdown I select "Rich Text."
However, as soon as I do that, it switches back to plain text.
I can't find any documentation anywhere that would indicate why I can't set this property...
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Mar 22, 2015
I have created a linked Excel table in Access 2010 called 'tblExcelLinked' and I have a form called 'ASB Log Form' for the purposes of presenting the data in a more readable manner that is easier to view, plus link other fields of data that are not directly related to the 'tblExcelLinked'.
Because there is no unique ID in the 'tblExcelLinked' to create a relationship, I have created a table called 'tblASB', which allows me to add other table data linked from same d/b.
I now want to update the 'tblASB' with data from the 'tblExcelLinked', but only append new records from 'tblExcelLinked', but my inadequate append query is duplicating the records each time I run it, rather than just adding the new ones.
Once sorted my next challenge is a macro so that this runs automatically rather than being manually triggered.
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Feb 12, 2014
When I tried paste some data using front end to my database, Access showed error (can't create record because data would be duplicated). I thought it's impossible because it is autonumber field. So I checked it (manually). I did copy of my database and then for testing, I created record. I was shocked. Next record should has a value of "160" but Access gave "130" then showed an error "Can't create record because data will be duplicated". Of course after compact and repair everything is fine.
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Aug 28, 2015
This is a errand database where each client can have several errands and some errands are related to each one and other.
Since each client can have several errands and and each errand is related to each one and other, then the client. I thought i need key which can work as a ClientErrandID, so i can tie the errands together. My idee is to use the ClientErrandID as an text auto incrementing field with a string like: (Errand-A-xxxx).
Lest say the range would be from (Errand-A-0000 to Errand-A-9999) And when the string hits "9999" at the end the "A" will switch to a "B" and the number counter would start over from "0000"
How should the table relationship look like?When a user is adding a new errand to a client, how should the function work?
Should all the associated errands be created in the background and granted the same Errand_ID when the main errand is created?Can i create a incrementing text field with vba & queries?
How would the code structure look like?Is there any examples on a incrementing text field with code available?
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Aug 19, 2013
The interface being used is a main form with various tabs and a subform on each of these tabs.
There is one field ('max power density') in my database that is calculated using 'Max Rated Power' and 'Cylinder Capacity' however these are in different tables and subforms. The 'max power density' and 'max rated power' are in table and subform 1 but 'cylinder capacity' is in table and subform 2. Is it possible to keep them in separate tables/subforms and still calculate the field?
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Oct 4, 2006
Hi,
I have a situation and i do not know how to handle it.
I am developing an application for a lawyer. In the data base i have the following tables: Files, the people table (that are involved in a lawsuit), and other tables. The problem is the following: in the people table, beside the primary key i have another unique element that is social security number.
In the files table beside the primary key another unique element exists: the number and date of the file (File 1 from 15.02.2006). A lawsuit file can have more law terms: today it has one law term and maybe next week another law term so i must have the same file many times in the table with the same code and another date, but i cannot add the same file many times in the data base because a file has data about one person and the social security number of the person is unique.
If anyone can offer me a solution it would be good.
Thank you!
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