Forms :: SQL To Add New Record Form One Table To Match Another

I have a form that I need to add a new record using embedded SQL rather than just binding the form and using an automatic new record. My form will display the needed random number in a textbox and that needs to be my new record number. So I need first to check to see if that number already exists as a record number then add it if it does not and either way insert or update a set of additional fields. Something like:

DoCmd.RunSQL "SELECT * FROM tblExceptions WHERE ReconciliationID = " & Me.txtReconciliationID
Psuedocode: IF Record Exists UPDATE Field1 and FIELD2
Else Create record and insert VALUES into Field1 and FIELD2
End If