Combine Text and Auto Number to create a unique ID

Posted on 2012-08-19
Medium Priority
Last Modified: 2012-08-19
I need to create a unique ID in a table when an access record is created on a form.  
I want to combine a text string with the auto number so that the default auto numbers from different data sources  would not result in a duplicate.  
The text string would be the first two characters from one field and some zeros combined with the auto number.  I would like to control the field length so that it would sort alpha numerically in the order that the records were created.
IE:  Combine the fields [Location] and [ID] so the result is  Lo000001:Lo000999,Lo001000... etc.
Thanks again!
Question by:AMixMaster
LVL 75

Accepted Solution

DatabaseMX (Joe Anderson - Microsoft MVP, Access and Data Platform) earned 2000 total points
ID: 38309867
I suggest instead you keep two separate fields, then create a Unique Index on the Auto Number and the Text String  ... this is much cleaner, and accomplishes the same thing.

Author Closing Comment

ID: 38309908
The text string would have hundreds of duplicates.  
I use a default value for the text string ( [Location] )for each remote database location.  
The auto number would have 1 dup for each table created remotely.  
We want to combine unique records.  
When appending to the main database, in order to prevent duplicates the append query table join would be set up...
That is the point where I thought that I would require a unique ID field

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