recordset

I am reading someone's code in VB but do not quite understand what does it mean.
The code likes below:
Dim rs as New ADODB.Recordset
...
rs.Open(sql selection statement: select ... from ... where ... )
   if rs.EOF = True Then
      rs.Close()
      rs.Open(another selection statement from another table)
         if rs.EOF = True Then
            .....

Any help? Thanks.