不同数据库的分页方式：
MySQL：
	select * from tb_name limit skipRow, pageSize;	// 不要求任何字段有序
	select * from tb_name where id > skipRow   and id < (skipRow + pageSize);	// 必须ID有序
	select * from tb_name where id > skipRow   limit pageSize;

Oracle:(ROWNUM隐含字段值或row_number(函数))
	select rownum, xxx_cols from tb_xxx where rownum between 10 and 15
	firstIndex: 起始索引
	pageSize: 每页显示的数量
	select * from (select ROWNUM as rn, a.* from XXX a where ROWNUM <= (firsrIndex + pageSize) ) where rn > firstIndex。

SQL Server:(row_number()函数)
	firstIndex：起始索引
	pageSize：每页显示的数量
	orderColumn：排序的字段名。
	select top pageSize 0.* from (select row_number() over(order by orderColumn) as rownumber.*) from XXX as o where rownumber > firstIndex;