DB_top3, top5 와 같은 기능/효과, limit

보여주고자하는 쿼리문에 lmit (숫자); 만 걸어주면 해당 갯수가 나옴

select * from board 
	where board_deletion="N" and board_type!="CS" and board_secret = "N"
   	 order by board_view desc limit 5;

select * from comment
	join board on board_id = board_comment_id
	where comment_deletion="N" and board_deletion="N"
   		order by comment_datetime desc limit 5;