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--Oracle方法1
SELECT * FROM

SELECT A.*, ROWNUM RN FROM (SELECT * FROM ss_custinfo) A
WHERE ROWNUM <= 40

WHERE RN >= 21;
--Oracle方法2
SELECT * FROM

select ss.*, rownum rn from ss_custinfo ss

WHERE rn <= 40 and rn>= 21;
 --Oracle方法3
SELECT * FROM

SELECT A.*, ROWNUM RN
FROM (SELECT * FROM ss_custinfo) A

WHERE RN BETWEEN 21 AND 40;
--sybase
select * from

select ss.*, row_number() over (order by cust_id desc ) as rn
from ss_custinfo ss
) temp
where temp.rn<=40 and temp.rn>=21;select * from

SELECT ss.*, row_number() OVER (partition by cust_id ORDER BY salary desc) rn
FROM ss_custinfo ss
) temp
where temp.rn<=40 and temp.rn>=21;Oracle数据库索引失效Oracle 获取 Number类型 null值相关资讯      Oracle教程 
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