sql查询主要包括以下4种：
第一种（top）：select top 10 * from n where Id not in(select top 10 Id from n)
第二种（max）：select top 10 * from n where Id >
(select Max(Id) from n where Id in(select top 10 Id from n))
第三种（between-and）：select * from n where Id between 11 and 20
第四种（row-number）：select * from (select *， Row_Number()over(order by Id)as number from n)t
where er between 11 and 20
