select * from table where trunc(sysdate-rq)=0
select * from table where trunc(sysdate-rq)=1
...
select * from table where trunc(sysdate-rq)=15
select * from table where trunc(sysdate-rq)=1
...
select * from table where trunc(sysdate-rq)=15
调试欢乐多
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