oracle 分页SQL语句改为HQL 语句

如何将oracle分页的SQL语句改为HQL语句,请大家帮帮忙!写好了,分全给你.
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SELECT * FROM
(
SELECT A.*, ROWNUM RN
FROM (SELECT * FROM TABLE_NAME) A
WHERE ROWNUM <= 40
)
WHERE RN >= 21
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这是读取数据库中的20-40的记录,帮我改为HQL语句,谢谢!在线等!