SQL: select posts belong a category in WordPress

特定のカテゴリーを「information」だとすると、

SELECT $wpdb->posts.* FROM $wpdb->posts ,
(SELECT $wpdb->term_relationships.object_id, tt1.term_id, tt1.name FROM $wpdb->term_relationships
, (SELECT $wpdb->term_taxonomy.term_taxonomy_id,wp_terms.term_id,$wpdb->terms.name FROM $wpdb->term_taxonomy, $wpdb->terms
WHERE $wpdb->term_taxonomy.term_id =$wpdb->terms.term_id ) tt1
WHERE $wpdb->term_relationships.term_taxonomy_id = tt1.term_taxonomy_id and tt1.name=”information”) tt2
where $wpdb->posts.post_status=”publish” and tt2.object_id=tsl_posts.ID order by $wpdb->posts.post_date DESC