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select makedate from
(select makedate,
sum(decode(weather,'雨',1,0))
over(order by makedate rows between 0 preceding and 2 following) dd
from TA) where dd>=2
select makedate from
(select makedate,
sum(decode('雨',1,0))
over(order by makedate rows between 0 preceding and 2 following) dd
from TA) where dd>=2