sql 查询记录数结果集某个区间内记录

网络编程 2021-07-05 13:42www.168986.cn编程入门
sqlserver如何实现查询记录数某个区间内记录,本文将提供多种解决方法,需要了解的朋友可以参考下
以查询前20到30条为例,主键名为id

方法一: 先正查,再反查
select 10 * from (select 30 * from tablename order by id asc) A order by id desc

方法二: 使用left join
select 10 A.* from tablename A
left outer join (select 20 * from tablename order by id asc) B
on A.id = B.id
where B.id is null
order by A.id asc

方法三: 使用not exists
select 10 * from tablename A
where id not exists
(select 20 * from tablename B on A.id = B.id)

方法四: 使用not in
select 10 * from tablename
where id not in
(select 20 id from tablename order by id asc)
order by id asc

方法五: 使用rank()
select id from
(select rank() over(order by id asc) rk, id from tablename) T
where rk between 20 and 30

中第五种方法看上去好像没有问题,查了下文档,当over()用于rank/row_number时,整型列不能描述一个列,所以会产生非预期的效果. 待考虑下,有什么办法可以修改为想要的结果.

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