Concatenate multiple rows in one field in Access? [duplicate]

Answer 1

As was pointed out by onedaywhen in an early post on SO, this is easier with ADO: Sample query:

   SELECT [Order Number], 
          ConcatADO("SELECT [Product Types] FROM Orders
                     WHERE [Order Number]=" & [Order Number],", "," : ") AS Cat
   FROM Orders
   GROUP BY [Order Number], 2;

Function using ADO

Function ConcatADO(strSQL As String, strColDelim, _
   strRowDelim, ParamArray NameList() As Variant)

   Dim rs As New ADODB.Recordset
   Dim strList As String

   On Error GoTo Proc_Err

       If strSQL <> "" Then
           rs.Open strSQL, CurrentProject.Connection
           strList = rs.GetString(, , strColDelim, strRowDelim)
           strList = Mid(strList, 1, Len(strList) - Len(strRowDelim))
       Else
           strList = Join(NameList, strColDelim)
       End If

       ConcatADO = strList

   Exit Function

   Proc_Err:
       ConcatADO = "***" & UCase(Err.Description)
End Function