上一篇下一篇 排序 (非ID字段排序)

　　网上看了很多关于"上一篇下篇"的文章，可大都是按ID排序。

　　实际上，很少有按ID排序的。

　　分享下我的单独排序字段的写法，主要分为ms sql2000 和 ms 2005及以上版本。 

　　SQL 2005及以上版本写法。

 1 declare @currentID int

 2 set @currentID=4

 3 

 4 ;with temp

 5 as

 6 (

 7     select row_number() over( order by short desc , createtime desc) as rowNum, *

 8     from ch_ItemInformation 

 9 )

10 select * from temp where rowNum in ((select rowNum from temp where id=@currentID)+1)

11 union all 

12 select * from temp where rowNum in ((select rowNum from temp where id=@currentID)-1)

SQL 2000写法

 

 1 --前提：排序后要唯一，即排序后不能有两条

 2 declare @Num int

 3 set @Num=1

 4 select @Num=@Num+1 from dbo.ch_ItemInformation

 5 where Short>=0 and ID >=10

 6 order by Short desc, ID desc

 7 

 8 set @Num=@Num+1

 9 select @Num

10 

11 select top 3 * from (

12 select top (select @Num) * from ch_ItemInformation order by Short desc, ID desc

13 ) as a

14 order by a.Short desc, a.ID desc 

     有网友问: 既然使用了row_number() 函数，where 中为何还用in？

     说明下: 只是为了找到ID对应的排序后的排序号. 改成等于号也行. 如下:

declare @currentID int set @currentID=1 ;with temp as ( select row_number() over( order by short desc , createtime desc) as rowNum, * from dbo.Product ) select * from temp where rowNum = ((select rowNum from temp where id=@currentID)+1) union all select * from temp where rowNum = ((select rowNum from temp where id=@currentID)-1)