sql 로 달력만들기

select sum(decode(day,'1',no)) 일,
        sum(decode(day,'2',no)) 월,
        sum(decode(day,'3',no)) 화,
        sum(decode(day,'4',no)) 수,
        sum(decode(day,'5',no)) 목,
        sum(decode(day,'6',no)) 금,
        sum(decode(day,'7',no)) 토
from (
       select rownum no, b.mm||b.dd yyyymmdd, to_char(to_date(b.mm||b.dd,'yyyymmdd'),'d') day ,
                 ceil((rownum + 7 - to_number(to_char(to_date(b.mm||b.dd,'yyyymmdd'),'d'))) / 7) week
       from
              ( select '200403' mm, lpad(rownum,2,'0') dd
                 from dict
                 where rownum <= 31 ) b
      where to_char(last_day(to_date(b.mm||'01','yyyymmdd')),'dd') >= b.dd
     ) x
group by week

order by week ;

SELECT MIN(DECODE(TO_CHAR(days, 'd'), 1, TO_CHAR(days, 'fmdd'))) 일,

       MIN(DECODE(TO_CHAR(days, 'd'), 2, TO_CHAR(days, 'fmdd'))) 월,

       MIN(DECODE(TO_CHAR(days, 'd'), 3, TO_CHAR(days, 'fmdd'))) 화,

       MIN(DECODE(TO_CHAR(days, 'd'), 4, TO_CHAR(days, 'fmdd'))) 수,

       MIN(DECODE(TO_CHAR(days, 'd'), 5, TO_CHAR(days, 'fmdd'))) 목,

       MIN(DECODE(TO_CHAR(days, 'd'), 6, TO_CHAR(days, 'fmdd'))) 금,

       MIN(DECODE(TO_CHAR(days, 'd'), 7, TO_CHAR(days, 'fmdd'))) 토

  FROM (SELECT base_mon + LEVEL - 1 days,

               (TRUNC(base_mon + LEVEL - 1, 'd') -

               TRUNC(TRUNC(base_mon + LEVEL - 1, 'y'), 'd')) / 7 + 1 week_grp

          FROM (SELECT TO_DATE('201306', 'yyyymm') base_mon FROM DUAL)

        CONNECT BY base_mon + LEVEL - 1 <= LAST_DAY(base_mon))

 GROUP BY week_grp

 ORDER BY week_grp;