显示一年所有的星期一，星期天的sql
SELECT rq,to_char(rq,'day')
FROM ? (SELECT trunc(SYSDATE, 'year') + ROWNUM - 1 rq
? ? ? ? FROM ? dual
? ? ? ? CONNECT BY ROWNUM <= (trunc(SYSDATE, 'year') + INTERVAL '1' YEAR) - trunc(SYSDATE, 'year'))
WHERE ?to_char(rq, 'd') IN (2,1)
