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Table problems (Oracle linked table)

Posted on 2011-02-17
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Last Modified: 2013-11-05
Hi Experts

I have a oracle table with 3 primary keys, that together are not unique. One of the primary keys is a empty column that i want to update with a unique number. Is that possible?
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Question by:DCRAPACCESS
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7 Comments
 
LVL 23

Expert Comment

by:OP_Zaharin
ID: 34914164
You can't create a primary key if the combination of the three field is not unique. You should update the empty field with unique number (or running number) first. Only after that you create the primary key.
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Author Comment

by:DCRAPACCESS
ID: 34914308
Hi op zaharin

it looks like this might work?

Dim rs As DAO.Recordset
Dim inti As Integer
Set rs = CurrentDb.OpenRecordset("SELECT id FROM xxx", dbOpenDynaset)
inti = 0
With rs
    Do Until .EOF
        .Edit
        inti = inti + 1
        !ID = inti
        .Update
        .Bookmark = .LastModified
    .MoveNext
    Loop
End With

but this was only tested on a access table and not the oracle table.
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LVL 23

Accepted Solution

by:
OP_Zaharin earned 2000 total points
ID: 34914327
OR during the insert statement into the table, include the unique/running number to that "empty field".

if u are using Oracle, you can use Oracle sequence. Create a trigger for that table so that everytime a record is inserted to that table, the trigger will create a unique running number (using sequence).
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LVL 23

Expert Comment

by:OP_Zaharin
ID: 34914407
Your code will do it for now.

But what if after the primary key have been created and you want to insert a new record to the table? So the next step is for you to modify by adding the unique number calculation into the insert statement for new records.
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Author Comment

by:DCRAPACCESS
ID: 34914427
Long story, but i can't insert new rows or put a sequence on the table. I'm only allowed to update the fields from access or delete rows. Please don't ask why (bureaucracy at my work).
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LVL 23

Expert Comment

by:OP_Zaharin
ID: 34940607
Hi DCRAPACCESS,
Have u able to update the field and create the primary key?
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Author Closing Comment

by:DCRAPACCESS
ID: 34940690
Sorry for the late answer. But it worked.
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