昨天我在SQL脚本上苦苦挣扎。我仍然没有得到理想的解决方案。我将此SQL脚本用于我的SSIS项目（datawarehousing）中的报告。
我有几个连接的查询。我使用的表格如下：
Factales - 单个客户的单个客户的单个客户的单个车辆的大量汇总（参考）钥匙和销售价格的事实表
DimDate - 2001年至2007年间具有不同日期符号的表格
dimcar - 有关汽车，购物车类型和制造商名称的信息
我想创建一个脚本来显示每年（每年）销售的最大车辆
我的查询是这样的
SELECT Count(*) most_cars_sold,
Car.carmodeltype,
Car.carmodeldetails,
Car.manufacturername,
dd.year
FROM factsales sale
INNER JOIN dimdate dd
ON dd.date_sid = sale.orderdate_sid
LEFT JOIN dimcar car
ON car.car_sid = sale.car_sid
GROUP BY Car.carmodeltype,
Car.carmodeldetails,
Car.manufacturername,
dd.year
结果是：
6 406 Break HDI 110pk XT Peugeot 2000
4 Civic DX 2dr Honda 2000
4 Octavia Combi TDi 74kW Comf4x4 Skoda 2000
3 Megane 1.5dCi Expressi.Basi.5d Renault 2000
3 Polo 1.9TDI Sportline 5drs Volkswagen 2000
3 Touran 2.0TDI Trendline Volkswagen 2000
3 Vectra 2.0DTi Comfort 4drs Opel 2000
3 Corolla D4-D 116 Sol Bus. Toyota 2000
3 Corolla Verso 2.0D4-D 90 Terra Toyota 2000
3 406 Break HDI 110pk GT Peugeot 2000
此示例仅显示2000，但结果将显示为2007年
然而..我只想显示 ＆＃34; 6 406打破HDI 110pk XT Peugeot 2000＆＃34;
然后我尝试了这个查询：
SELECT Max(most_cars_sold) maxSold,
year
FROM (SELECT Count(*) most_cars_sold,
Car.carmodeltype,
Car.carmodeldetails,
Car.manufacturername,
dd.year
FROM factsales sale
INNER JOIN dimdate dd
ON dd.date_sid = sale.orderdate_sid
LEFT JOIN dimcar car
ON car.car_sid = sale.car_sid
GROUP BY Car.carmodeltype,
Car.carmodeldetails,
Car.manufacturername,
dd.year) foo
GROUP BY year
ORDER BY year,
maxsold DESC
结果：
6 2000
6 2001
4 2002
5 2003
4 2004
4 2005
5 2006
2 2007
看起来很好..但我在结果中也需要CarModelType, CarModelDetails, ManufacturerName ..
有人可以帮忙吗？
答案 0 :(得分：0)
试试这个，如果您使用PostgreSQL或Oracle，您可以使用Windows函数更短的脚本
SELECT a.maxSold,
a.year,
b.carmodeltype,
b.carmodeldetails,
b.manufacturername
FROM (
SELECT Max(most_cars_sold) maxSold,
year
FROM (SELECT Count(*) most_cars_sold,
Car.carmodeltype,
Car.carmodeldetails,
Car.manufacturername,
dd.year
FROM factsales sale
INNER JOIN dimdate dd
ON dd.date_sid = sale.orderdate_sid
LEFT JOIN dimcar car
ON car.car_sid = sale.car_sid
GROUP BY Car.carmodeltype,
Car.carmodeldetails,
Car.manufacturername,
dd.year) foo
GROUP BY year
ORDER BY year,
maxsold DESC )a
INNER JOIN (SELECT Count(*) most_cars_sold,
Car.carmodeltype,
Car.carmodeldetails,
Car.manufacturername,
dd.year
FROM factsales sale
INNER JOIN dimdate dd
ON dd.date_sid = sale.orderdate_sid
LEFT JOIN dimcar car
ON car.car_sid = sale.car_sid
GROUP BY Car.carmodeltype,
Car.carmodeldetails,
Car.manufacturername,
dd.year) b on b.most_cars_sold=a.maxSold
答案 1 :(得分：0)
WITH TIES当您想要返回两个或多个在有限结果集中最后一个位置的行时使用。必须与ORDER BY子句一起使用。 WITH TIES可能会导致返回的行数多于表达式中指定的值。例如，如果expression设置为5但是另外两行与第5行中ORDER BY列的值匹配，则结果集将包含7行
----------------------------------------------------------------------------
--Test tables start
----------------------------------------------------------------------------
if object_id(N'tempdb..#factsales', N'U') is not null drop table #factsales;
select [orderdate_sid] = 1, [car_sid] = 1
into #factsales
union all select 1, 1
union all select 1, 2
union all select 1, 2
union all select 1, 3
union all select 2, 1
union all select 2, 3
union all select 3, 1
union all select 3, 2
union all select 3, 2;
--select * from #factsales
if object_id(N'tempdb..#dimdate', N'U') is not null drop table #dimdate;
select [date_sid] = 1, [year] = 2000
into #dimdate
union all select 2, 2002
union all select 3, 2003;
--select * from #dimdate
if object_id(N'tempdb..#dimcar', N'U') is not null drop table #dimcar;
select [car_sid] = 1, [carmodeltype] = N'406', [carmodeldetails] = N'Break HDI 110pk XT', [manufacturername] = N'Peugeot'
into #dimcar
union all select 2, N'Civic', N'DX 2dr', N'Peugeot'
union all select 3, N'Octavia', N'Combi TDi 74kW Comf4x4', N'Skoda';
--select * from #dimcar
----------------------------------------------------------------------------
--Test tables end
----------------------------------------------------------------------------
select top(1) with ties
sq.*
from
(
select [most_cars_sold] = count(*)
,car.[carmodeltype]
,car.[carmodeldetails]
,car.[manufacturername]
,dd.[year]
from #factsales as sale
join #dimdate as dd on dd.[date_sid] = sale.[orderdate_sid]
left join #dimcar as car on car.[car_sid] = sale.[car_sid]
group by car.[carmodeltype], car.[carmodeldetails], car.[manufacturername], dd.[year]
) as sq
order by dense_rank() over(partition by sq.[year] order by [most_cars_sold] desc);
答案 2 :(得分：0)
SELECT Max(most_cars_sold) OVER (PARTITION BY Year) maxSold
,Year
,carmodeltype
,carmodeldetails
,manufacturername
FROM (
SELECT Count(*) most_cars_sold
,Car.carmodeltype
,Car.carmodeldetails
,Car.manufacturername
,dd.year
FROM factsales sale
INNER JOIN dimdate dd ON dd.date_sid = sale.orderdate_sid
LEFT JOIN dimcar car ON car.car_sid = sale.car_sid
GROUP BY Car.carmodeltype
,Car.carmodeldetails
,Car.manufacturername
,dd.year
) foo
ORDER BY YEAR
答案 3 :(得分：0)
我找到了自己的解决方案..如果你问我，这是一种非常特殊的方法......但结果很有希望
SELECT Concat(Cast(Max(most_cars_sold) AS NVARCHAR(255)), year),
Max(most_cars_sold) cars_sold,
year,
carmodeltype,
carmodeldetails,
manufacturername
FROM (SELECT Count(*) most_cars_sold,
Car.carmodeltype,
Car.carmodeldetails,
Car.manufacturername,
dd.year
FROM factsales sale
INNER JOIN dimdate dd
ON dd.date_sid = sale.orderdate_sid
LEFT JOIN dimcar car
ON car.car_sid = sale.car_sid
GROUP BY Car.carmodeltype,
Car.carmodeldetails,
Car.manufacturername,
dd.year) foo
GROUP BY year,
carmodeltype,
carmodeldetails,
manufacturername
HAVING Concat(Cast(Max(most_cars_sold) AS NVARCHAR(255)), year) IN (SELECT
Concat(Cast(Max(most_cars_sold) AS NVARCHAR(255)), year)
FROM (
SELECT
Count(*) most_cars_sold,
Car.carmodeltype,
Car.carmodeldetails,
Car.manufacturername,
dd.year
FROM
factsales sale
INNER JOIN dimdate dd
ON dd.date_sid = sale.orderdate_sid
LEFT JOIN dimcar car
ON car.car_sid = sale.car_sid
GROUP BY Car.carmodeltype,
Car.carmodeldetails,
Car.manufacturername,
dd.year) foo
GROUP BY year)
ORDER BY year
我做了什么:)我已经将cars_sold与年份联系起来，以作出独特的参考 稍后我会在having子句上使用相同的查询来比较唯一性和仅基于most_cars_sold和year的查询..
我喜欢它：D
结果是
62000 6 2000 406 Break HDI 110pk XT Peugeot
62001 6 2001 406 Break HDI 110pk XT Peugeot
42002 4 2002 Astra 2.2DTi Njoy 5drs Opel
42002 4 2002 Vectra GTS 2.2DTi Elegance Opel
52003 5 2003 Laguna Gr.Tour dCi 100pk Auth. Renault
42004 4 2004 406 Break HDI 90pk XT Peugeot
42004 4 2004 Zafira 2.2DTi Elegance Opel
42004 4 2004 Passat 1.9TDI 74kW Comfortline Volkswagen
42005 4 2005 Passat Var.TDI 96kW H5 Comfl. Volkswagen
42005 4 2005 Polo 1.4TDI Atlantic 5drs Volkswagen
42005 4 2005 Megane 1.9dCi Privileg.Comf.5d Renault
52006 5 2006 406 Break HDI 90pk XT Peugeot
22007 2 2007 A 160CDI Elegance Mercedes-Benz
22007 2 2007 Golf 1.9TDI 74kW Basis Tip.3dr Volkswagen
22007 2 2007 Ibiza 1.9TDi 96kW Sport 3drs Seat