摘要:
下文讲述使用sql脚本实现相邻两条数据相减的方法,如下所示:
实验环境:sql server 2008 r2
实现思路:
1.使用cte表达式,对当前表进行重新编号
2.使用左连接对 表达式 生成的临时表进行错位连接,并对生成的新纪录中两列进行相减
create table [maomao365] (sort varchar(30),qty int); go ----生成基础数据 insert into [maomao365](sort, qty)values ('maomaoa',10),('maomaob',20), ('maomaoc',30),('maomaod',40), ('maomaoe',50),('maomaof',60) go with cte_temp as ( select row_number() over(order by qty asc ) as keyid ,* from [maomao365] ) select a.sort,a.qty,b.qty,(isnull(a.qty,0)-isnull(b.qty,0)) as [相邻行之差] from cte_temp a left join cte_temp b on a.keyid =(b.keyid+1) ---计算相邻两行之差 go truncate table [maomao365] drop table [maomao365]