날짜범위 지정
SELECT
TO_CHAR(TO_DATE('20150401','yyyymmdd') + LEVEL - 1, 'yyyymmdd') AS SOLAR_DATE,
TO_CHAR(TO_DATE('20150401','yyyymmdd') + LEVEL - 1, 'D') AS WEEK_DAY
FROM DUAL
CONNECT BY LEVEL <= TO_DATE('20150530','yyyymmdd') - TO_DATE('20150401','yyyymmdd') + 1
오늘 기준 30일 전후
SELECT
TO_CHAR((SYSDATE - 30) + LEVEL - 1, 'yyyymmdd') AS SOLAR_DATE,
TO_CHAR((SYSDATE - 30) + LEVEL - 1, 'D') AS WEEK_DAY
FROM DUAL
CONNECT BY LEVEL <= (SYSDATE + 30) - (SYSDATE - 30) + 1
오늘 기준 마지막 날까지 출력
SELECT SYSDATE + LEVEL -1 AS DAYS
FROM DUAL
CONNECT BY SYSDATE + LEVEL -1 <= LAST_DAY(SYSDATE)
