by AKR (3 Submissions)
Category: Databases/Data Access/DAO/ADO
Compatability: VB 6.0
Difficulty: Unknown Difficulty
Originally Published: Sat 11th August 2001
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
Display Common attributes of MS Access tables-ADO
API Declarations
Dim rsMDB as ADODO.Recordset
Dim strCon As String
Dim strDBSource As String
Dim c11 As Collection, c12 As Collection, c13 As Collection
Dim c21 As Collection, c22 As Collection, c23 As Collection
Dim strSQL as String
Dim intTabnum as Integer
Dim i as Integer, j as Integer
Dim booCommon as Boolean
Dim x as Integer, y as Integer
' -----------------------------------------------------------------------------
' If there is some better and more elegant manner of achieving the same thing,
' please submit your code to this site. It would be very helpful to me.
' -----------------------------------------------------------------------------
VBcoders
Screen.MousePointer = 13
Set Conn = New ADODB.Connection
strCon = "Data Source=E:\FRC\;" ' <!! Change to your database folder !!>
With Conn
.Provider = "Microsoft.Jet.OLEDB.4.0;Persist Security Info=False;"
.ConnectionString = strCon
.Open
End With
Set c11 = New Collection
Set c12 = New Collection
Set c13 = New Collection
' All fields in first table are taken as the base and checked in all other
' tables. When it finds a match it returns True and checking stops for that
' field in that particular table. The next field is checked. If not
' found in one table, that field is removed from the collection. Finally, only
' the common Attributes will be left in the Collection
strSQL = "Select * From Table1" <!! Change to your table name !!>
Set rsMDB = Conn.Execute(strSQL)
For i = 0 To rsMDB.Fields.Count - 1
c11.Add rsMDB.Fields(i).Name
c12.Add rsMDB.Fields(i).Type
c13.Add rsMDB.Fields(i).DefinedSize
Next i
rsMDB.Close
' Now check with all items in other tables, keeping c1 items constant
With Conn
.Provider = "Microsoft.Jet.OLEDB.4.0;Persist Security Info=False;"
.ConnectionString = strCon
.Open
End With
' I had my tables named Table1, Table2, etc and in one folder
' If you have yours in different folders, with different names you could
' retrieve the folder name using String functions and use a for loop right
' here to get each path and then each table name and connect to each table one
' after the other
For intTabNum = 2 To 4
strSQL = "Select * From Table" & TabNum
Set rsMDB = Conn.Execute(strSQL)
Set c21 = New Collection
Set c22 = New Collection
Set c23 = New Collection
For j = 0 To rsMDB.Fields.Count - 1
c21.Add rsMDB.Fields(j).Name
c22.Add rsMDB.Fields(j).Type
c23.Add rsMDB.Fields(j).DefinedSize
Next I
rsMDB.Close
booCommon = False ' Used to check whether a field in Table 1 is in
' any of the other tables
For x = 1 To c11.Count
For y = 1 To c21.Count
If c11(x) = c21(y) And c12(x) = c22(y) And c13(x) = c23(y) Then
' Field name, type and size are equal ----
booCommon = True
Exit For ' Exit the inner For loop, because this
' field has already been found to be common
Else
' Field not common to table 1 and this table, so return false
' and remove this field from all collections (c11, 12, 13)
booCommon = False
End If
Next y
' Please trap error properly. I am still working on it.
On Error Resume Next
If booCommon = False Then
c11.Remove (x)
c12.Remove (x)
c13.Remove (x)
x = x - 1
End If
Next x
Next intTabNum
Next i
' Finally, display the common attributes in a List box
For k = 1 To c11.Count
List1.AddItem c11(k)
Next
Set c11 = Nothing
Set c12 = Nothing
Set c13 = Nothing
Set c21 = Nothing
Set c22 = Nothing
Set c23 = Nothing
Conn1.close
Screen.MousePointer = 1
End Sub
