[AccessD] Record number in query

Hi Chris

This is the function we use. Note it allows for browsing and is very fast.
For large recordsets you should run a reset afterwards to kill the collection and free memory.

Public Function RowCounter( _
  ByVal strKey As String, _
  ByVal booReset As Boolean) _
  As Long
  
' Builds consecutive RowIDs in select, append or create query
' with the possibility of automatic reset.
'
' Usage (typical select query):
'   SELECT RowCounter(CStr([ID]),False) AS RowID, *
'   FROM tblSomeTable
'   WHERE (RowCounter(CStr([ID]),False) <> RowCounter("",True));
'
' The Where statement resets the counter when the query is run
' and is needed for browsing a select query.
'
' Usage (typical append query, manual reset):
' 1. Reset counter manually:
'   Call RowCounter(vbNullString, False)
' 2. Run query:
'   INSERT INTO tblTemp ( RowID )
'   SELECT RowCounter(CStr([ID]),False) AS RowID, *
'   FROM tblSomeTable;
'
' Usage (typical append query, automatic reset):
'   INSERT INTO tblTemp ( RowID )
'   SELECT RowCounter(CStr([ID]),False) AS RowID, *
'   FROM tblSomeTable
'   WHERE (RowCounter("",True)=0);
'
' 2002-04-13. Cactus Data ApS. CPH
' 2002-09-09. Str() sometimes fails. Replaced with CStr().
' 2005-10-21. Str(col.Count + 1) reduced to col.Count + 1.

  Static col As New Collection
  
  On Error GoTo Err_RowCounter
  
  If booReset = True Then
    Set col = Nothing
  Else
    col.Add col.Count + 1, strKey
  End If
  
  RowCounter = col(strKey)
  
Exit_RowCounter:
  Exit Function
  
Err_RowCounter:
  Select Case Err
    Case 457
      ' Key is present.
      Resume Next
    Case Else
      ' Some other error.
      Resume Exit_RowCounter
  End Select

End Function

/gustav

>>> spikee at oatlandspark.org.uk 25-05-2006 09:29 >>>
Good day!

Dumb question here.

I've got a SELECT query and wish to add a calculated field with row number.
The number needs to start at 1, for the first record, and increment to n for
record n. I'm sure I've seen a post here recently about this but I cannot
find it in the archives.

TIA!
Chris Foote