每一個分類取最新的幾條的SQL完成代碼。本站提示廣大學習愛好者：（每一個分類取最新的幾條的SQL完成代碼）文章只能為提供參考，不一定能成為您想要的結果。以下是每一個分類取最新的幾條的SQL完成代碼正文
CREATE TABLE table1( [ID] [bigint] IDENTITY(1,1) NOT NULL, [Name] [nvarchar](128) NOT NULL, [class] int not null, [date] datetime not null)class 表現分類編號。 分類數不固定， 至多有上千種分類
date 表現該筆記錄被更新的時光
我們如今想取得每一個分類最新被更新的5筆記錄。
處理計劃
select id,name,class,date from(select id,name,class,date ,row_number() over(partition by class order by date desc)as rowindex from table1) awhere rowindex <= 5
create table #temp
(
company varchar(50),
product varchar(50),
inputDate datetime
)
insert into #temp(company,product,inputDate) values('杭州年夜明無限公司','汽車1','2010-8-1')
insert into #temp(company,product,inputDate) values('杭州年夜明無限公司','汽車2','2010-8-1')
insert into #temp(company,product,inputDate) values('杭州年夜明無限公司','汽車3','2010-8-1')
insert into #temp(company,product,inputDate) values('杭州年夜明無限公司','汽車4','2010-8-1')
insert into #temp(company,product,inputDate) values('杭州年夜明無限公司','汽車5','2010-7-1')
insert into #temp(company,product,inputDate) values('北京小科無限公司','汽車1','2010-8-1')
insert into #temp(company,product,inputDate) values('北京小科無限公司','汽車2','2010-8-1')
insert into #temp(company,product,inputDate) values('北京小科無限公司','汽車3','2010-8-1')
insert into #temp(company,product,inputDate) values('北京小科無限公司','汽車4','2010-8-1')
insert into #temp(company,product,inputDate) values('上海有得無限公司','汽車1','2010-8-1')
insert into #temp(company,product,inputDate) values('上海有得無限公司','汽車2','2010-8-1')
insert into #temp(company,product,inputDate) values('上海有得無限公司','汽車3','2010-8-1')
insert into #temp(company,product,inputDate) values('上海有得無限公司','汽車4','2010-8-1')
insert into #temp(company,product,inputDate) values('天津旺旺無限公司','汽車4','2010-8-1')
insert into #temp(company,product,inputDate) values('天津旺旺無限公司','汽車5','2010-8-1')
select * from #temp
create proc getdata
@num int
as
begin
select top 4 * from
(
select ( select count(*) from #temp where company=a.company and product<=a.product) as 序號,a.company,a.product,a.inputDate
from #temp a
) b
where 序號>=@num
order by 序號,inputDate desc
end
go
getdata 2
/*
成果
1 杭州年夜明無限公司 汽車1 2010-08-01 00:00:00.000
1 北京小科無限公司 汽車1 2010-08-01 00:00:00.000
1 上海有得無限公司 汽車1 2010-08-01 00:00:00.000
1 天津旺旺無限公司 汽車4 2010-08-01 00:00:00.000
2 天津旺旺無限公司 汽車5 2010-08-01 00:00:00.000
2 上海有得無限公司 汽車2 2010-08-01 00:00:00.000
2 北京小科無限公司 汽車2 2010-08-01 00:00:00.000
2 杭州年夜明無限公司 汽車2 2010-08-01 00:00:00.000
3 杭州年夜明無限公司 汽車3 2010-08-01 00:00:00.000
3 北京小科無限公司 汽車3 2010-08-01 00:00:00.000
3 上海有得無限公司 汽車3 2010-08-01 00:00:00.000
4 北京小科無限公司 汽車4 2010-08-01 00:00:00.000
4 北京小科無限公司 汽車4 2010-08-01 00:00:00.000
4 上海有得無限公司 汽車4 2010-08-01 00:00:00.000
4 杭州年夜明無限公司 汽車4 2010-08-01 00:00:00.000
5 杭州年夜明無限公司 汽車5 2010-07-01 00:00:00.000
*/
--sql2005
create proc getdata2005
@num int
as
begin
select top 4 * from
(
select row_number() over (partition by company order by product ) as 序號,a.company,a.product,a.inputDate
from #temp a
) b
where 序號>=@num
order by 序號,inputDate desc
end
getdata2005 4
select * from #temp
select ( select count(*) from #temp where company+ product<=a.company+a.product) as 序號,a.company,a.product,a.inputDate
,a.company+a.product as 獨一標記一行
from #temp a
order by company,product
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->if object_id(N'company') is not null
drop table company
go
create table company
(
companyname varchar(2),
product varchar(60)
)
--公司1
insert into company
select 'A','A1' union
select 'A','A2' union
select 'A','A3' union
select 'A','A4' union
select 'A','A5' union
select 'A','A6' union
select 'A','A7' union
select 'A','A8' union
select 'A','A9' union
select 'A','A10'
--公司2
insert into company
select 'B','B1' union
select 'B','B2' union
select 'B','B3' union
select 'B','B4' union
select 'B','B5' union
select 'B','B6' union
select 'B','B7' union
select 'B','B8' union
select 'B','B9' union
select 'B','B10'
--公司3
insert into company
select 'C','C1' union
select 'C','C2' union
select 'C','C3' union
select 'C','C4' union
select 'C','C5' union
select 'C','C6' union
select 'C','C7' union
select 'C','C8' union
select 'C','C9' union
select 'C','C10'
--公司4
insert into company
select 'D','D1' union
select 'D','D2' union
select 'D','D3' union
select 'D','D4' union
select 'D','D5' union
select 'D','D6' union
select 'D','D7' union
select 'D','D8' union
select 'D','D9' union
select 'D','D10'
--公司5
insert into company
select 'E','E1' union
select 'E','E2' union
select 'E','E3' union
select 'E','E4' union
select 'E','E5' union
select 'E','E6' union
select 'E','E7' union
select 'E','E8' union
select 'E','E9' union
select 'E','E10'
--公司6
insert into company
select 'F','F1' union
select 'F','F2' union
select 'F','F3' union
select 'F','F4' union
select 'F','F5' union
select 'F','F6' union
select 'F','F7' union
select 'F','F8' union
select 'F','F9' union
select 'F','F10'
--公司7
insert into company
select 'G','G1' union
select 'G','G2' union
select 'G','G3' union
select 'G','G4' union
select 'G','G5' union
select 'G','G6' union
select 'G','G7' union
select 'G','G8' union
select 'G','G9' union
select 'G','G10'
--公司8
insert into company
select 'H','H1' union
select 'H','H2' union
select 'H','H3' union
select 'H','H4' union
select 'H','H5' union
select 'H','H6' union
select 'H','H7' union
select 'H','H8' union
select 'H','H9' union
select 'H','H10'
--公司9
insert into company
select 'I','I1' union
select 'I','I2' union
select 'I','I3' union
select 'I','I4' union
select 'I','I5' union
select 'I','I6' union
select 'I','I7' union
select 'I','I8' union
select 'I','I9' union
select 'I','I10'
--公司10
insert into company
select 'J','J1' union
select 'J','J2' union
select 'J','J3' union
select 'J','J4' union
select 'J','J5' union
select 'J','J6' union
select 'J','J7' union
select 'J','J8' union
select 'J','J9' union
select 'J','J10'
IF (select Object_id('Tempdb..#t')) IS NULL
select identity(int,1,1) as id,* into #t from company
order by left(product,1),cast(substring(product,2,2) as int)
if object_id(N'getdata','P') is not null
drop table getdata
go
create proc getdata
@num1 int --第幾頁
as
begin
select companyname,product from
(
select row_number() over (partition by companyname order by id) as 序號,*
from #t
) a
where 序號=@num1
order by companyname
end
go
getdata 4
go
DROP procedure getdata
