Question

刷新一些sql ...我正在尝试创建一个每年销售总额（2005-2008）的客户列表，但只会向客户显示之前（2005-2007）的销售情况但尚未销售2008。

我已经构建了两个查询...不确定哪个更有效，但无论哪种方式我似乎无法弄清楚如何正确实现where子句。

任何帮助都将非常感谢!!

查询1：

select r.ResellerName,
(select sum(rs.SalesAmount) from FactResellerSales rs
where rs.ResellerKey = r.ResellerKey
and rs.OrderDateKey >=20050101 and rs.OrderDateKey <20060101) '2005',

(select sum(rs.SalesAmount) from FactResellerSales rs 
where rs.ResellerKey = r.ResellerKey
and rs.OrderDateKey >=20060101 and rs.OrderDateKey <20070101) '2006',

(select sum(rs.SalesAmount) from FactResellerSales rs
where rs.ResellerKey = r.ResellerKey
and rs.OrderDateKey >=20070101 and rs.OrderDateKey <20080101) '2007',

(select sum(rs.SalesAmount) from FactResellerSales rs
where rs.ResellerKey = r.ResellerKey
and rs.OrderDateKey >=20080101 and rs.OrderDateKey <20090101) '2008'

From DimReseller r
order by r.ResellerName ASC

查询2：

Select r.ResellerName,
SUM(case when OrderDateKey>=20050101 and OrderDateKey<20060101 then rs.SalesAmount else 0 end) '2005',
SUM(case when OrderDateKey>=20060101 and OrderDateKey<20070101 then rs.SalesAmount else 0 end) '2006',
SUM(case when OrderDateKey>=20070101 and OrderDateKey<20080101 then rs.SalesAmount else 0 end) '2007',
SUM(case when OrderDateKey>=20080101 and OrderDateKey<20090101 then rs.SalesAmount else 0 end) '2008'

from DimReseller r
inner join FactResellerSales rs on rs.ResellerKey = r.ResellerKey
Group by r.ResellerName
Order by ResellerName ASC

Answer 1

只需将查询2用作内部查询，并选择2008年为零的位置：

Select r.ResellerName,
SUM(case when OrderDateKey>=20050101 and OrderDateKey<20060101 then rs.SalesAmount else 0 end) '2005',
SUM(case when OrderDateKey>=20060101 and OrderDateKey<20070101 then rs.SalesAmount else 0 end) '2006',
SUM(case when OrderDateKey>=20070101 and OrderDateKey<20080101 then rs.SalesAmount else 0 end) '2007',
SUM(case when OrderDateKey>=20080101 and OrderDateKey<20090101 then rs.SalesAmount else 0 end) '2008'    
from DimReseller r
inner join FactResellerSales rs on rs.ResellerKey = r.ResellerKey
Group by r.ResellerName) x
Having SUM(case when OrderDateKey>=20080101 and OrderDateKey<20090101 then rs.SalesAmount else 0 end) = 0
Order by ResellerName ASC

'2008'列始终为0，因此您不需要它，或者可以用常量0替换它：

select
...
0 as '2008'
...

如果你愿意的话。

Answer 2

应该容易吗？只需在子选择中选择2008年没有Sales的resellerkeys并将它们连接到FactResellerSales？

SELECT rs.* 
 FROM FactResellerSales rs
 JOIN (SELECT DISTINCT r.ResellerKey
         FROM FactResellerSales
         WHERE OrderDateKey < 20080101) r on rs.ResellerKey = r.ResellerKey

更新

SELECT r.ResellerName,
       sum(rs.SalesAmount) AS SalesAmount
       YEAR(convert(date,CONVERT(varchar(10),rs.OrderDateKey,101))) AS SALES_YEAR
FROM DimReseller r
INNER JOIN (SELECT rs.SalesAmount,
                   rs.Resellerkey,
                   rs.OrderDateKey
              FROM FactResellerSales rs
              INNER JOIN (SELECT DISTINCT a.ResellerKey
                            FROM FactResellerSales
            WHERE OrderDateKey < 20080101) a on rs.ResellerKey = a.ResellerKey) sub on r.Resellerkey = sub.Resellerkey
GROUP BY r.ResellerName
ORDER BY r.ResellerName ASC

总销售额：显示过去但没有当前销售额的客户

2 个答案: