Insert Into with Select Statement Does Work

[Newbie in ChiTown]

Here's my code:

I am using MS Access and I am trying to update a table (InvoiceDetails ) with data input by the user on a form. However, it does not update nor does it give me an error message. Code listed below.

Also, can you recommend a book on SQL.

Thanks.

Dim con As Object
Dim rs As ADODB.Recordset
Dim strSql As String
        
Set con = Application.CurrentProject.Connection
 Set rs = New ADODB.Recordset
    
      
strSql = "INSERT INTO InvoiceDetails " & _
             "(fkInvoiceID, InvD_Employee, Inv_Description) " & _
             "SELECT CDO_Invoice.InvoiceNumber, CDOActivity.EmployeeID, " & _
             "CDOActivity.Description " & _
             "FROM CDO_Invoice, CDOActivity " & _
             "WHERE CDOActivity.DateofActivity = " & Me.txtStartDate & " " & _
             "AND CDOActivity.fkCDO = " & Me.cboCDO.Value & " ; "
            
        MsgBox strSql
    
    rs.Open strSql, con, 1    ' 1 = adOpenKeyset

[NeoPa]

This is not a simple code-fixing service (even if it were a LOT more background information would be required before starting). Try posting the resultant SQL as a start (in CODE tags this time please) and we'll see if anything obvious jumps out.
I'm afraid I don't know of a book. I learnt by playing with it and referring to the help system when necessary.