Question

这似乎是一个非常常见的问题，但我似乎找不到容易过渡到我的问题的答案。通常情况下，人们在寻找缺失月份的0，我的是多年。我只是在寻找过去10年中销售的每种产品，以显示10年的数量，或者如果没有，则显示0。

我的代码显示有销售的年份：

select upper(_producttype) as _product, YEAR(_date) as _year, 
coalesce(SUM(s._quantity * pu._usdperunit),0)  as _profit  
from QualityControl.dbo._Shipment s
join QualityControl.dbo._ProductUnits pu
on pu._prodid = s._productid
where year(GETDATE())-YEAR(_date) < 11
and upper(_producttype) != 'EQUIPMENT'
group by YEAR(_date), _producttype

order by  _producttype, YEAR(_date)

我的查询给出了过去10年（+当前）的列表：

select distinct YEAR(_date) as _year
from QualityControl.dbo._Shipment s
where year(GETDATE())-YEAR(_date) < 11
and _producttype != 'Equipment'
order by  YEAR(_date)

我尝试过将_profit设为0的联盟。我尝试过交叉连接，但此时似乎有太多列。在这一点上任何帮助将非常感激。

谢谢。

Answer 1

如果不更改您的查询，您可以执行以下操作。

只需将您的分组数据放入一个CTE
岁的另一个
创建第三个子集，即不同产品和年份的组合
组合和数据之间的联接

WITH CTE_Data AS 
(
    select upper(_producttype) as _product, YEAR(_date) as _year, 
    coalesce(SUM(s._quantity * pu._usdperunit),0)  as _profit  
    from QualityControl.dbo._Shipment s
    join QualityControl.dbo._ProductUnits pu
    on pu._prodid = s._productid
    where year(GETDATE())-YEAR(_date) < 11
    and upper(_producttype) != 'EQUIPMENT'
    group by YEAR(_date), _producttype
)
, CTE_Years AS 
(
    select distinct YEAR(_date) as _year
    from QualityControl.dbo._Shipment s
    where year(GETDATE())-YEAR(_date) < 11
    and _producttype != 'Equipment'
)
, CTE_AllCombo AS 
(
    SELECT DISTINCT y._year, d._Product
    FROM CTE_Years y
    CROSS JOIN CTE_Data d
)
SELECT c._year, c._product, COALESCE(d._profit, 0) AS _profit
FROM CTE_AllCombo c
LEFT JOIN CTE_Data d ON d._year = c._year and d._product = c._product

为空年选择0和

1 个答案: