Description
int 
odbc_num_rows ( resource result_id)
     odbc_num_rows() will return the number of rows
     in an ODBC result.  This function will return -1 on error.  For
     INSERT, UPDATE and DELETE statements
     odbc_num_rows() returns the number of rows
     affected.  For a SELECT clause this can be 
     the number of rows available.
    
     Note: Using odbc_num_rows() to determine the
     number of rows available after a SELECT will return -1 with many
     drivers.