表结构如下:
订单号 品牌ID 线路 时间 张数
XXX A SQ 2008-10-1 2
XXX B SF 2008-10-1 3
XXX C SQ 2008-10-1 1
XXX A SQ 2008-10-1 1
XXX A SF 2008-10-1 2
XXX B SF 2008-10-1 3
XXX C SF 2008-10-1 1
XXX A SQ 2008-10-1 1
.....怎么按时间段(一天)取出按品牌,线路分组统计的张数的前N位.
即:订单号 品牌ID 线路 时间 张数
XXX A SQ 2008-10-1 5
XXX A SF 2008-10-1 4
XXX A SC 2008-10-1 3
XXX B SQ 2008-10-1 10
XXX B SF 2008-10-1 9
XXX B XF 2008-10-1 3
XXX C XF 2008-10-1 6
XXX C XQ 2008-10-1 5
XXX C SQ 2008-10-1 1
订单号 品牌ID 线路 时间 张数
XXX A SQ 2008-10-1 2
XXX B SF 2008-10-1 3
XXX C SQ 2008-10-1 1
XXX A SQ 2008-10-1 1
XXX A SF 2008-10-1 2
XXX B SF 2008-10-1 3
XXX C SF 2008-10-1 1
XXX A SQ 2008-10-1 1
.....怎么按时间段(一天)取出按品牌,线路分组统计的张数的前N位.
即:订单号 品牌ID 线路 时间 张数
XXX A SQ 2008-10-1 5
XXX A SF 2008-10-1 4
XXX A SC 2008-10-1 3
XXX B SQ 2008-10-1 10
XXX B SF 2008-10-1 9
XXX B XF 2008-10-1 3
XXX C XF 2008-10-1 6
XXX C XQ 2008-10-1 5
XXX C SQ 2008-10-1 1
where checksum(*) in (select top 3 checksum(*) from test b where a.品牌ID=b.品牌ID order by 张数 desc)
/*我们经常会有这样的需求,即按照地区来分别取出每个地区排名前3的那些记录。本文总结了几种方法,希望大家补充。首先,创建测试用的表和数据,如下:*/create table test
(
areaid int,
score int
)
insert into test select 0,10
union all select 0,20
union all select 0,30
union all select 0,40
union all select 0,50
union all select 1,10
union all select 1,20
union all select 1,30
union all select 1,40
union all select 1,50
union all select 2,10
union all select 2,20
union all select 2,30
union all select 2,40
union all select 2,50
go--第一种方法适用于sql2000和2005,其代码如下:select * from test a
where checksum(*) in (select top 3 checksum(*) from test b where a.areaid=b.areaid order by score desc)--第二种方法是利用sql2005的函数ROW_NUMBER,其代码如下:WITH test1 AS
(
SELECT *,
ROW_NUMBER() OVER (PARTITION BY areaid ORDER BY score desc) AS 'RowNumber'
FROM test
)
SELECT *
FROM test1
WHERE RowNumber BETWEEN 1 AND 3;--第三种方法是利用sql2005的cross apply来实现,其代码如下:select distinct t.* from test a
cross apply
(select top 3 areaid,score from test
where a.areaid=areaid order by score desc) as T
select top 3 品牌ID,线路,时间,张数 from
(
select 品牌ID,线路,时间,张数=sum(张数)
from tb
group by 品牌ID,线路,时间
) t
order by 张数 desc
--> 生成测试数据: #T
IF OBJECT_ID('tempdb.dbo.#T') IS NOT NULL DROP TABLE #T
CREATE TABLE #T (订单号 VARCHAR(3),品牌ID VARCHAR(1),线路 VARCHAR(2),时间 DATETIME,张数 INT)
INSERT INTO #T
SELECT 'XXX','A','SQ','2008-10-1',2 UNION ALL
SELECT 'XXX','B','SF','2008-10-1',3 UNION ALL
SELECT 'XXX','C','SQ','2008-10-1',1 UNION ALL
SELECT 'XXX','A','SQ','2008-10-1',1 UNION ALL
SELECT 'XXX','A','SF','2008-10-1',2 UNION ALL
SELECT 'XXX','B','SF','2008-10-1',3 UNION ALL
SELECT 'XXX','C','SF','2008-10-1',1 UNION ALL
SELECT 'XXX','A','SQ','2008-10-1',1--SQL查询如下:SELECT DISTINCT 订单号,
品牌ID,线路,时间,b.张数
FROM #T AS a
CROSS APPLY
(
SELECT TOP 3
SUM(张数) AS 张数
FROM #T
WHERE 品牌ID=a.品牌ID
AND 线路=a.线路
GROUP BY CONVERT(VARCHAR(10),时间,120)
) AS b
ORDER BY 品牌ID,线路,时间/*
订单号 品牌ID 线路 时间 张数
---- ---- ---- ----------------------- -----------
XXX A SF 2008-10-01 00:00:00.000 2
XXX A SQ 2008-10-01 00:00:00.000 4
XXX B SF 2008-10-01 00:00:00.000 6
XXX C SF 2008-10-01 00:00:00.000 1
XXX C SQ 2008-10-01 00:00:00.000 1(5 行受影响)*/
--> 生成测试数据: #T
IF OBJECT_ID('tempdb.dbo.#T') IS NOT NULL DROP TABLE #T
CREATE TABLE #T (订单号 VARCHAR(3),品牌ID VARCHAR(1),线路 VARCHAR(2),时间 DATETIME,张数 INT)
INSERT INTO #T
SELECT 'XXX','A','SQ','2008-10-1',2 UNION ALL
SELECT 'XXX','B','SF','2008-10-1',3 UNION ALL
SELECT 'XXX','C','SQ','2008-10-1',1 UNION ALL
SELECT 'XXX','A','SQ','2008-10-1',1 UNION ALL
SELECT 'XXX','A','SF','2008-10-1',2 UNION ALL
SELECT 'XXX','B','SF','2008-10-1',3 UNION ALL
SELECT 'XXX','C','SF','2008-10-1',1 UNION ALL
SELECT 'XXX','A','SQ','2008-10-1',1--SQL查询如下:SELECT DISTINCT 订单号,
品牌ID,线路,时间,b.张数
FROM #T AS a
CROSS APPLY
(
SELECT TOP 3
SUM(张数) AS 张数
FROM #T
WHERE 品牌ID=a.品牌ID
AND 线路=a.线路
GROUP BY CONVERT(VARCHAR(10),时间,120)
ORDER BY 张数 DESC
) AS b
ORDER BY 品牌ID,线路,时间/*
订单号 品牌ID 线路 时间 张数
---- ---- ---- ----------------------- -----------
XXX A SF 2008-10-01 00:00:00.000 2
XXX A SQ 2008-10-01 00:00:00.000 4
XXX B SF 2008-10-01 00:00:00.000 6
XXX C SF 2008-10-01 00:00:00.000 1
XXX C SQ 2008-10-01 00:00:00.000 1(5 行受影响)*/
N=3的时候
品牌ID 线路 张数 线路 张数 线路 张数
A SQ 5 SF 4 SC 3
B XF 10 SF 9 XF 3
C XF 6 XQ 5 SQ 1
......
select 品牌ID,线路,时间,张数 from
(
select 品牌ID,线路,时间,张数,rn=ROW_NUMBER() over(partition by 品牌ID,线路,时间 order by 张数 desc) from
(
select 品牌ID,线路,时间,张数=sum(张数)
from tb
group by 品牌ID,线路,时间
) t
) t1
where rn between 1 and 3