Compare two excel sheets

Question

How do I compare two excel sheet and determine which column is missing?

(I would like to compare a list of countries from sheet A with sheet B, then mark which count

Answer 1

You can use ADO with Excel

Dim cn As Object
Dim rs As Object
Dim strFile As String
Dim strCon As String
Dim strSQL As String
Dim s As String
Dim i As Integer, j As Integer

''This is not the best way to refer to the workbook
''you want, but it is very conveient for notes
''It is probably best to use the name of the workbook.

strFile = ActiveWorkbook.FullName

''Note that if HDR=No, F1,F2 etc are used for column names,
''if HDR=Yes, the names in the first row of the range
''can be used. 
''This is the Jet 4 connection string, you can get more
''here : http://www.connectionstrings.com/excel

strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & strFile _
    & ";Extended Properties=""Excel 8.0;HDR=Yes;IMEX=1"";"

''Late binding, so no reference is needed

Set cn = CreateObject("ADODB.Connection")
Set rs = CreateObject("ADODB.Recordset")


cn.Open strCon

 ''Query example:
 strSQL = "SELECT Country " _
       & "FROM [Sheet1$] a " _
       & "WHERE Country NOT IN " _
       & "SELECT Country FROM [Sheet2$]"


''Open the recordset for more processing
''Cursor Type: 3, adOpenStatic
''Lock Type: 3, adLockOptimistic
''Not everything can be done with every cirsor type and 
''lock type. See http://www.w3schools.com/ado/met_rs_open.asp

rs.Open strSQL, cn, 3, 3

If rs.Count>0 Then
    MsgBox rs.GetString
End If

It is also possible to quickly write the recordset to a sheet with CopyFromRecordset.