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现在有一个表Questioin，主码是qid，要求选择第m行到第n行的元组
//方法一：效率最低
//错误：如果n<m，将选取前n条数据，如果n>=m，将选取从m+1开始的n条数据
select top n * from Question where qid not in { select top m qid from Question }
//当然改成下面的就正确了
select top(n-m)* from Question where qid not in (select top m id from Question)
//方法二：先排序，据说效率最高
select top m * from (select top n * from Question order by qid asc)a order by qid desc
//方法三：利用ROW_NUMBER函数对元组编号（推荐使用）
SELECT * FROM ( SELECT ROW_NUMBER() OVER(ORDER BY qid) as rowIndex,* FROM Question )b WHERE b.rowIndex>=m AND b.rowindex<=n
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原文地址：http://www.cnblogs.com/yxr1993/p/4198791.html
