Oracle中查询本月星期5的所有日期列表的语句

SELECT *
FROM (SELECT TRUNC(SYSDATE, 'mm') + ROWNUM - 1 DAYS
FROM (SELECT LEVEL
FROM DUAL
CONNECT BY LEVEL =
TRUNC(LAST_DAY(SYSDATE)) - TRUNC(SYSDATE, 'mm') + 1))
WHERE TO_CHAR(DAYS, 'd') = '6'