トップセールスの人を見つけよう

Question

Topとbottonの10％の販売員を探しています。SQL 2005または2008を使用してこれを行うにはどうすればよいですか？

DECLARE @Sales TABLE 
(
SalesPersonID varchar(10), TotalSales int 
) 


INSERT @Sales 
SELECT 1, 200 UNION ALL 
SELECT 2, 300 UNION ALL 
SELECT 7, 300 UNION ALL 
SELECT 4, 100 UNION ALL 
SELECT 5, 600 UNION ALL 
SELECT 5, 600 UNION ALL 
SELECT 2, 200 UNION ALL 
SELECT 5, 620 UNION ALL 
SELECT 4, 611 UNION ALL 
SELECT 3, 650 UNION ALL 
SELECT 7, 611 UNION ALL 
SELECT 9, 650 UNION ALL 
SELECT 3, 555 UNION ALL 
SELECT 9, 755 UNION ALL 
SELECT 8, 650 UNION ALL 
SELECT 3, 620 UNION ALL 
SELECT 5, 633 UNION ALL 
SELECT 6, 720 
GO 

また、私は部門を追加すると、どのようにして各部門のトップ10％とボトム10％を見つけるために同じクエリを書くことができますか？私は両方のクエリが欲しいです。

Answer 1

--Top 10% 
SELECT TOP 10 PERCENT SalesPersonID, SUM(TotalSales) FROM @Sales 
GROUP BY SalesPersonID 
ORDER BY SUM(TotalSales) ASC 

--Bottom 10% 
SELECT TOP 10 PERCENT SalesPersonID, SUM(TotalSales) FROM @Sales 
GROUP BY SalesPersonID 
ORDER BY SUM(TotalSales) DESC 

あなたは例えば列部門VARCHAR（20）追加した場合：

--By Dept 
SELECT TOP 10 PERCENT Department, SUM(TotalSales) FROM @Sales 
GROUP BY Department 
ORDER BY SUM(TotalSales) ASC/DESC //(Whichever one you want) 

Answer 2

TOP 10％

select top 10 percent SalesPersonID, sum(TotalSales) 
    from Sales 
order by sum(TotalSales) 
group by SalesPersonID 

BOTTOM 10％

select top 10 percent SalesPersonID, sum(TotalSales) 
    from Sales 
order by sum(TotalSales) desc 
group by SalesPersonID 

Answer 3

CTEバージョン：

DECLARE @Sales TABLE (SalesPersonID varchar(10), TotalSales int)INSERT @Sales 
SELECT 1, 200 UNION ALL 
SELECT 2, 300 UNION ALL 
SELECT 7, 300 UNION ALL 
SELECT 4, 100 UNION ALL 
SELECT 5, 600 UNION ALL 
SELECT 5, 600 UNION ALL 
SELECT 2, 200 UNION ALL 
SELECT 5, 620 UNION ALL 
SELECT 4, 611 UNION ALL 
SELECT 3, 650 UNION ALL 
SELECT 7, 611 UNION ALL 
SELECT 9, 650 UNION ALL 
SELECT 3, 555 UNION ALL 
SELECT 9, 755 UNION ALL 
SELECT 8, 650 UNION ALL 
SELECT 3, 620 UNION ALL 
SELECT 5, 633 UNION ALL 
SELECT 6, 720 


;with a as 
(
    select SalesPersonID, sum(TotalSales) as Total 
    from @Sales 
    group by SalesPersonID 
) 
select coalesce(a.SalesPersonID, b.SalesPersonID) as SalesPersonID, coalesce(a.Total,b.Total) as Total 
from a a 
    full outer join a b 
     on a.SalesPersonID=b.SalesPersonID 
where a.SalesPersonID in (select top 10 percent SalesPersonID from a order by Total desc) 
    or b.SalesPersonID in (select top 10 percent SalesPersonID from a order by Total) 
order by a.Total desc