Suffix Field Values based on number of occurrences in Table

Question

I have a table in MS Access that has a field layout_desc . I need to create a query that changes each value in this field by adding how many times the value is repeated in the table.

For example:

Thank you.

Answer 1

Without a primary key:

Assuming that your table does not contain a primary key field by which to sort records using a domain aggregate function, one possible method is using Static variables in VBA.

• Open the VBA IDE using Alt + F11
• Insert a new Public Module Alt + I , M

• Copy the following basic code into the new Module:

   Function Occurrence(Optional strVal As String) As Long Static lngTmp As Long Static strTmp As String If strTmp = strVal Then lngTmp = lngTmp + 1 Else lngTmp = 1 strTmp = strVal End If Occurrence = lngTmp End Function 

• In MS Access, create a new query with the following SQL, changing YourTable to the name of your table:

   update (select t.layout_desc from YourTable as t order by t.layout_desc) q set q.layout_desc = q.layout_desc & occurrence(q.layout_desc) 

With a primary key:

If your table were to include a primary key, say id , of Long Integer data type, you could use the domain aggregate function DCount in the following way:

update YourTable t
set t.layout_desc = t.layout_desc & 
dcount("*","YourTable","layout_desc = '" & t.layout_desc & "' and id <= " & t.id)