#!/usr/bin/perl
use strict;

use Bio::DB::UCSC::DB;
use DBIx::SQLEngine;

my $db = Bio::DB::UCSC::DB->new('dbi:mysql:database=hg18','uname','passwd');

my $sqldb = DBIx::SQLEngine->new('dbi:mysql:database=hg18','uname','passwd');

my $refGenes1 = $sqldb->fetch_select(
  tables => {'refGene.name' => 'refLink.mrnaAcc'},
  where => ['refGene.name like ?','NM_0002%']);

my $refGenes = $db->fetch_select(
  tables => {'refGene.name' => 'refLink.mrnaAcc'},
  where => ['refGene.name like ?','NM_0002%']);