1.$query_1 = mysql_query("SELECT topic_id FROM tb_topic");
2.while($result_1 = mysql_fetch_array($query_1)){
3.
4. $query_2 = mysql_query("SELECT title,detail FROM tb_detail WHERE tb_detail.topic_id='".$result_1["topic_id"]."'");
5. $result_2 = mysql_fetch_array($query_2);
6. echo $result_2["title"]." ".$result_2["detail"]."<br>";
7.
8.}
