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--rowid分頁，第一步
select rowid rid,sal from emp order by sal desc;
--rowid分頁，第二步
select rownum rn,rid from( select rowid rid,sal from emp order by sal desc ) where rownum<10;
--rowid分頁，第三步
select rid from(select rownum rn,rid from(select rowid rid,sal from emp order by sal desc) where rownum<10) where rn>5;
--rowid分頁，第四步
select * from emp where rowid in(select rid from(select rownum rn,rid from(select rowid rid,sal from emp order by sal desc) where rownum<10) where rn>5);
?
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第一層：獲取數(shù)據(jù)物理地址
第二層：取得最大頁數(shù)
第三層：取得最小頁數(shù)
第四層：因為取得的頁數(shù)都是物理地址，再根據(jù)物理地址，插敘出具體數(shù)據(jù)
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