월별게시글수

일별 게시판 게시글수 select TO_CHAR(BF_REG_DATE, &#39;YYYYMMDD&#39;) as 날짜, count(*) as 게시글수 from board_free where BF_REG_DATE >=&#39;20180101&#39; and BF_REG_DATE =&#39;20180101&#39; and BF_REG_DATE < ..