SELECT md1.node_id
 FROM `meta_data` as md1,`meta_data` as md2,`meta_data` as md3
 WHERE md1.name = ?
   AND md1.value = ?
   AND md2.name = ?
   AND md2.value = ?
   AND md3.name = ?
   AND md3.value = ?
   AND md1.node_id = md2.node_id = md3.node_id;