select *
from a
where a.time between
(select b.startdate
from b b
where sysdate between startdate and enddate)
and (select b.enddate
where sysdate between startdate and enddate);
SELECT?TO_CHAR(ADD_MONTHS(SYSDATE,?-1),?'MM')?AS?上月,
TO_CHAR(SYSDATE,?'MM')?AS?本月,
TO_CHAR(ADD_MONTHS(SYSDATE,?1),?'MM')?AS?下月
FROM?DUAL
DECLARE
BEGIN
NEXT_MONTH := TO_CHAR(ADD_MONTHS(SYSDATE, 1),'YYYYMM');
DBMS_OUTPUT.PUT_LINE(NEXT_MONTH);
END;
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