select * from aaa where to_char(rq,'yyyymmdd') between '20011101' and '20020301';
直接在rq上加函数，如果应用大（这个表内数据很多时），查询速度会相当慢的，为了提高查询速度，强烈建议这样书写： select * from aaa where rq between to_date('2001-11-01','yyyy-MM-DD') and to_date('2002-03-01' ,'YYYY-MM-DD');
推荐使用 select * from aaa where rq>;=to_date('2001-11-01','yyyy-MM-DD') and rq<=to_date('2002-03-01' ,'YYYY-MM-DD');
用between的函数可能会慢些 select * from table1 where 时间段 between to_date('2010-05-03 09','yyyy-mm-dd hh24') and to_date('2010-05-03 12','yyyy-mm-dd hh24');
CREATE OR REPLACE PROCEDURE usp_refreshTopN IS BEGIN --文档 INSERT INTO topnresource(resourceId,title,type,cover,brief,properUser,tag,clickAmount,createDate,topNCreateDate,organizat ......
