Creating An Unique ID
May 20, 2005
I am very new to db programing so please forgive for such a simple program.
Here is the deal. I have a db for about 500 students.
I would like the table [Students] to create a unique ID "number" for each student. I would like the number to be based on information from the same table. For example if the student's name is John Doe and his number is 555-1212 then I would like to the id to be JD1212. I plan on using more than name and phone number but this was just to show you, what i am trying to get done.
I can do this using a form and a calculated control, but I can't get the table and form to kiss and make up. I was also told you can't save data from a calculated control in a form to a table and it is gernerally not a good idea, so I was told.
Any help would be appreciated.
Sincerely,
Pastor Nick.
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Aug 21, 2005
Hi all,
Got my job database going quite well, at the moment, it generates a job number form the first 4 letters of the customers name, and the ID (autonumber), so for example mr smith's job number would be SMIT0012 (assuming the 12th entry in the database)
Now this works fine, tables are linked and the database access the tables via a mapped network drive for other pc's (2) to use. But the problem is, if the database user were to be at a remote location with a laptop, how could this work? I could use a local copy of the tables but then of course the ID's wouldnt match! Can anyone offer any ideas on this?
Thanks
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Aug 22, 2004
i was wondering how to go about doing this, i currently have a query which returns all the payments due in the next month, going to a report which acts as an invoice. I was wondering how to create a unique id for each invoice and store the last id so that i can automatically itterate it later
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Aug 21, 2006
I'm working on a database that has to be done in Access and in coming up with a unique ID for each worker I want to take the first letter of the first and last name and the last 4 digits of their social to create the UID for the table. So for FIRST_NAME:Homer LAST_NAME:Simpson with SOCIAL:123-45-6789 his UID would be HS6789. Is there a function within Access that would allow me to do that, or is that something that's just too advanced?
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Feb 20, 2007
Hi all,
I have been trying to incorporate an access DB in to our business for sometime, but keep coming up against the same issue. We have a numbering system for the jobs we do, which was invented many years ago and cannot be changed. It is in the format "month/Year/unique 3 digits" the 3 digits are sequential, i.e. 02/07/123 ... 02/07/124... etc. I will need this all in one field.
So far I have managed to get the month and year (easy enough) with the expression "=Month(Now()) & "/" & Right(Year(Now()),2) & "/"" Now I need to get the sequential 3 digits at the end, however, I am not sure of any way to do this and it has stumped many people. I have a field that is autonumbered, but don't seem to be able to add this to the end of the expression.
If any of you have any suggestions I would be greatful - bear in mind I am only a begginer at this.
Thanks in advance.
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Aug 19, 2013
What I have is a small POS system I'm trying to create a unique invoice number for each transaction (multiple records)
I have two tables, one named "CurrentTransactions" and one named "Past Transactions".
I have everything working except the invoice number my system works by adding pre defined records into the table "CurrentTransactions" and once the sale has been finalised it transfers the data to the "PastTransactions" table.
take the last number from the "PastTransactions"."InvoiceNumber" to create an invoice number in the "CurrentTransactions", and I want to be able to do it using an expression in the default value property as opposed to in the form ( I've tried the form way but using Dmax would require me to almost rebuild my entire POS system )
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Jul 18, 2005
Hi,
Anyone know how to create a combo box that has unique month and year entries from a table (month in one column and year in another - i.e. 2 columns)?
I've been able to get the textbox of the combobox to output the correct format using a custom format but it does not affect the combobox data. Also, I'm not sure how to separate this by two columns...
Any help would be much appreciated!
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Feb 15, 2013
I have a rental database and I print several contacts for leases etc. what I want to do is have a unique reference number or something inserted to the report every time that it's printed. What I am trying to achieve is to keep track of which tenant corresponds to the report (Lease) printed by using reference number.
There is a seperate form which holds the tenants details and I would like to have a field on that form which would show the same reference number as the report so I can track which report was printed for who.
Whats the best/easiest way to accomplish this?
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May 31, 2013
I'm creating a database using existing data from an excel file full of contact details. What I need to add is a queue type system where each contact in the database has a "Place in Queue" number which is unique obviously.
Lets say Alan is number 1, Bob is 2 and Chris is 3. They have these corresponding numbers in the queue field for their entries.
Now what I need to have, through use of a form, is a way of changing Chris from number 3 in the queue to number 1 and thus have Alan automatically shift down to number 2 and Bob to 3.
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Aug 1, 2014
I have been working on a simple data base for some time now (beginner level) and am still trying to improve it. I would like to do something but before that I would like to have your opinion to know if it is even possible?I have a query QryMainReport:
Start Date/Time
End Date/Time
Employee
At the moment this is what the format of my report looks like (I removed other unnecessary fields):
StartTime----------EndTime---------------Employee
12/06/2014 01:00--12/06/2014 03:00------John Smith
12/06/2014 04:00--12/06/2014 06:00------Jane Doe
13/06/2014 02:00--13/06/2014 05:00------John Smith
13/06/2014 08:00--13/06/2014 08:00------Jane Doe
I would like to do as a report. (Dates would always be from Sunday to Saturday). I am not sure it is possible to do that. I suppose first it would mean:I would have to do a query to separate the times from the dates?I would have to find a way for Access to find the unique dates and unique names?Does it mean I have to use cross tab queries?
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May 20, 2015
I am creating a database for creating quotations. The quotation number is generated using the date, for example the first quote today would be quote number "05202015-1" because it is the first one today. The next quote today would be quote number "05202015-2" and so on. Is there a way to make access automatically generate these quote numbers based on the date?
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Jul 14, 2005
I am just about to start a new DB, but there are a few things I need to sort before i start.
I am working with a quotation system etc which will require the use of unique IDs...
eg 000123 then 000124 etc, this bit is not a problem.
The thing I would like to know how to do is when someone makes an order, I would like the quotation number to be changed slightly to add more detail.
For eg, If the quotation number that is allocated is 00123 and they then order a Conservatory, I would need to have this 00123 become 00123CNS, but this can be in a seperate field, Which I would need anyway.
The question is, How Would I go about this.
I have a table that describrives the product, TBL_PRODUCTS; ID, Product_Type, Product_ABBR
Product_Type = for e.g Conservatory
Product_ABBR = for e.g CNS
I would need the ref number and product abbr combined to create an order number.
[note] There will be a check box to say of ordered ot not, so I assume there will be an If statement somewhere?
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Sep 24, 2005
I've been on other forums with this problem but no one can solve my problem.
I've created a database with 3 tables that are linked:
- tbl_customer
- tbl_rates
- tbl_destination
They have the following fields:
tbl_customer
- cust_id
- customer_code
- first_name
- last_name
- company
tbl_rates
- rates_id
- cust_id
- rates_id
- currency
- pre_rate
- cur_rate
- fut_rate
- comment
- eff_from
tbl_destination
- dest_id
- destination
- destination_code
What I've done is created a form based on the tbl_customer table and used tbl_rates as a sub form. tbl_destination is used to populate a combo box that is situated in the sub form.
Each customer has their own rate sheet. Each rate sheet has different destinations and rates. Rates for the same destination are constantly changing. I need to use this spreadsheet to record the history of every change made to the rates of a particular destination. To do this I've just added the same destination with a new rate.
Now, what I want to do is to create a query that will only show the latest entry of a particular entry.
Eg. tbl_rate
Rate_id - Dest_id - currency - pre_rate - cur_rate - comment - eff_from
1 - 1 - £ - 0.01 - 0.03 - increase - 19 Sept 05
2 - 2 - £ - 0.12 - 0.14 - increase - 19 Sept 05
3 - 1 - £ - 0.03 - 0.02 - decrease - 23 Sept 05
I would want the query to show me the following from the above table:
Rate_id - Dest_id - currency - pre_rate - cur_rate - comment - eff_from
2 - 2 - £ - 0.12 - 0.14 - increase - 19 Sept 05
3 - 1 - £ - 0.03 - 0.02 - decrease - 23 Sept 05
Basically, the query should only show the latest entry which involves Dest_id '1' because there were two entries with the same id.
I've been given advice about this issue but none that actually work.
I would be grateful for any help on this matter.
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Nov 2, 2004
So I've read a good 100 postings or so so far on the subject of how generating a unique identifier through any other means than an autonumber can be dangerous. But I can't resist the opportunity to simply ask if there is a way to make this possible, if only through a calculated field...
In my single user database, I have an employment table with an autonumber [EmploymentID] field as its primary key. The employment table exists in a one-to-many relationship with it's child, the income table where each form of income is recorded as it is recieved so that one form of employment (or employer) can produce many unique forms of income (like weekly paycheques).
I would like to be able to generate an identifier for the income table that is a combination of the parent [EmploymentID] field and an increasing number to produce something that looks like this:
1006789-001 -|
1006789-002 -|--> Same EmploymentID
1006789-003 -|
1006790-001 ----> New EmploymentID with a reset numeric
Any ideas?
~Chad
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Nov 12, 2004
Hello Everyone,
I've data already entered (access/tables) on two different computers, however for the clientid on one computer has a hypen (-) and on another - because of something they couldn't get the hypen to work - so they used the slash (/) my Q is: 1) can I search and convert these to one, 2) is it wise the have / or - in the id?
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Jul 6, 2005
I have a beginner Question....How can I set an unique Index on a field in a table if all the four fields are using duplicate values?
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Jul 31, 2007
I have thought about this for days now (and nights) and I have simplified my problem below. (I even bought a book)
I have three tables: 1, 2 and 3.
Table 1 = a, b and c
Table 2 = x, y and z
Table 3 combines table 1 and table 2; ax, ay, az, bx, by, bz, etc.
Table 1 and Table 2 are both One to Many with Table 3.
The Table 1 field and Table 2 field are a ‘unique’ index combination.
My Problem:
It would be very handy to produce a list of the ‘unique’ index combinations that are not in Table 3. That is, the ‘unique’ index combinations that aren’t used yet.
You could do this by trial and error, but is there a Query you can run that will give you a result that you could then Append?
An Unmatched Query on the Table 3 / Table 1 contents will point out a complete lack of either a, b or c as will the same Query on Table 2 for missing x, y or z.
A query with the two non-linked tables will give every combination, but is this the best way to do it? It works by default when you use it to append table 3, but is it the best way to do it?
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Sep 30, 2007
Hi There,
I am setting up a basic Data Licence database. For each new record I enter I want a unique number to appear at the top of my form that can not be changed. I would like the number to be the date it is entered plus the auto number so, YYMMDD-(auto number) eg 071001-1. I'm sure it's something simple but I am only new to access.
Also while I'm here, on my form I have a Product field, how can I make it so I can enter in more then one product?
I would really appreciate any help!
Thank you,
Dane
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Apr 14, 2008
Is there a way to format the random auto number to just be 4 digits long? Or does anyone know how I can programatically create an auto unique field? This number has to be stamped on a key so it can't be longer than 4 characters but it has to be unique. Any help would be greatly appreciated.
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Apr 18, 2008
Hi all
I have been discussing DB table design with a colleague and we have a difference of opinion with regards to primary key ID fields .
My argument is that they should not be actual data but separate, that is an unique record identifier typically an autonumber type. I'm sure I picked this up from reading Access manuals.
My colleague's argument is: if the data contains a unique field, e.g. a unique project number in a table of projects (no project should be listed twice) then use the project number as the primary key. Her second argument is the byte size of an autonumber is 8 bytes whereas you can use a smaller data type to hold the project number thus saving space.
My opinion is that her first reason is flawed as it assumes no change to how projects are identified and that her second argument is irrelevant in today's Gb and Tb systems.
Without trawling through my Access books and the internet for opinions, I would like to know what your opinions are on this subject. I would appreciate good reasons which ever side of the fence you are on. I'm quite willing to be proved wrong and change my ways.
Cheers
Imperator
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Aug 3, 2006
I have a query which displays two fields: client ID and order type. I want to be able to display the client only once per order type. I tried to use GROUP BY order type but that gives me a missing expression message. I also thought of using UNIQUE as YES in qry properties but I'm not sure as to which row that property applies (all of them?). What is the best way to display a unique client in one row and order type in the other? So for example for order type "CASH" I wil then have a list of unique individualIDs.
thanks,
M
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Aug 16, 2006
Hi,
I have been trying for the last couple of week or so to get a query working.
Basically the query is used to show Hours worked by Post Code. Everything works fine and the query returns 'Hours Worked By Postcode' and Number of Records that the data was created from. (See Report in Attached DB)
However I have now been asked also to show the number of unique Members who by PCode make up the records.
So the report would look like:
By Post Code (See Report)
Number Of Members - Number Of Records - TotalTime
I am having problems returning the number of Unique Members who make up the data, in the query you will see Test and Test1 where I have tried to implement a unique count with no success.
Any help would be appreciated.
Thanks
Daz......
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Mar 1, 2007
I have a query that has an Item, ItemPrice, Allocation, and DatePurchased ordered by DatePurchased with only unique values.
I'm using it for a PO Database, when entering items purchased, I have the Item field populated with a items previously purchased, when the item is selected the Unit Price and Allocation Fields are autofilled in with the most recent values from the PO details table.
My problem is if I purchase 10 of the same Items on 10 different dates then the combo box will show 10 of the same Items, because they are not unique values because of the DatePurchased.
What I want is a query to show one unique Item entry with the most recent Purchase Price. I can get a list of unique Items, by only making a query of those and showing only unique values, but as soon as the date is introduced it no longer works, for obvious reasons.
Any help appreciated,
JOe K.
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Sep 20, 2007
Hello,
I noticed my subject has been discussed numerous times in this forum. I must have read nearly all topics, but I simply can't get it to work.
I have a table listing: country | category | article | turnover
I wish to make a query which gives me:
country | sum of turnover | count of (unique) categories used by this country | count of (unique) articles sold by this country.
This way I can evaluate with how many different categories a certain country achieves a certain turnover...
It look so simple but I can't figure it out. I hope I'm clear in my question.
HEEELP!
Cheers,
Stefan
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Jan 15, 2008
I have a database to track client activity per session.
Each client has a unique client number but multiple activities.
Therefore, if I have 20 clients in the database and each has 3 activities, I have 60 client numbers, 3 *20 = 60. ( Duplicated)
My elementary problem is how do I display the client activity unduplicated so that my query returns only 1 unique client number per session.
I tried the unique records/values in the property box but still.....
Thanks for your help.
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Nov 8, 2005
I've a form in which one of the fields the user enters is supposed to be a unique id. The unique id is an alphanumeric text box.
However, it's possible that another user enters an id that has already been previously used.
I'm thinking that I need to run a Find Duplicates Query with the text box entry and a table that holds all the previously entered ids prior to the form being saved so that I can inform the user of the possible duplication.
My question is are there any ideas on how I can do this or code it?
Thanks
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