.按rownum來分*
select * from (select t.*,rownum rn from(select * from t_xiaoxi order by cid desc)t where rownum<10000) where rn>9980;
其中t_xiaoxi為表名稱，cid為表的關鍵字段，取按cid降序排序後的第9981-9999條記錄，t_xiaoxi表有70000多條記錄。
//測試通過的分頁查詢okokok
select * from (select a1.*, rownum rn from(select ename,job from emp) a1 where rownum<=10)where rn>=5;
下面最主要介紹第三種：按rownum來分
rownum 分頁
select * from emp;
顯示rownum[oracle分配的]
select e.*, rownum rn from (select * from emp) e;
rn相當於oracle分配的行的id號
3.挑選出6—10條記錄
先查出1-10條記錄
select e., rownum rn from (select * from emp) e where rownum <= 10;
如果後面加上rownum>=6是不行的，
4. 然後查出6-10條記錄
select * from (select e., rownum rn from (select * from emp) e where rownum <= 10) where rn >= 6;
5. 幾個查詢變化
a. 指定查詢列，只需要修改最裡層的子查詢
只查詢雇員的編號和工資
select * from (select e., rownum rn from (select ename, sal from emp)
e where rownum <= 10) where rn >= 6;
b. 排序查詢，只需要修改最裡層的子查詢
工資排序後查詢6-10條資料
select * from (select e., rownum rn from (select ename, sal from emp order
by sal) e where rownum <= 10) where rn >= 6;
用查詢結果建立新錶.
這個命令是一種快捷的建表方式
create table mytable (id, name, sal, job, deptno) as select empno, ename,
sal, job, deptno from emp;
建立好之後，desc mytable；和select * from mytable;看看結果如何？
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