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select rownum, t3.* from (select count(*) from (select * from TRIPINFO t where t.starttime between 20130905001339 and 20130905202651) t2 group by t2.starthour order by t2.starthour) t3 from dual
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原文地址：http://www.cnblogs.com/xiaoshi212/p/4178241.html
