Question

我有2个表：部门和销售。在我的部门表中，我有一个劳工部门ID和与之关联的销售部门的ID。我还希望允许部门的销售人员来“累积”＃34;到另一个部门。我需要帮助查询＆＃34;汇总＆＃34;销售。

以下是表格：

TABLE = Departments
LaborDeptid | AssociatedSalesDept | RollUpTo
1                    101              0   
2                    102              0
3                    103              1
4                    104              0

TABLE = Sales
Date      | Sales | SalesDept
1/1/2014    10.00     101 
1/1/2014    10.00     101
1/1/2014    10.00     102
1/1/2014    10.00     102
1/1/2014    10.00     103
1/1/2014    10.00     103
1/1/2014    10.00     104
1/1/2014    10.00     104

这是我想要的输出：

OUTPUT
Date      | LaborDept | TotalSales
1/1/2014       1         40.00
1/1/2014       2         20.00
1/1/2014       4         20.00

如您所见，劳动部门1包括销售部门101和103的销售。但我不知道如何做到这一点。按部门汇总的查询很容易：

select 
    Date,
    LaborDept,
    sum(sales) as TotalSales
from sales s
inner join departments d on s.SalesDept = d.AssociatedSalesDept 
group by Date,LaborDept`

但我怎么做＆＃34;汇总＆＃34;？我尝试在连接中添加一个case语句，如下所示：

select 
    sum(sales) as TotalSales,
    Date,
    LaborDept
from sales s
inner join departments d on s.SalesDept = case when d.RollUpTo <> 0 then 
(select AssociatedSalesDept 
from departments
where d.RollUpTo = LaborDeptID)
else d.AssociatedSalesDept end
group by Date,LaborDept

但这只是将103个销售部门全部放在一起。它似乎不是正确的做法。

Answer 1

select s.[Date], coalesce(d2.LaborDeptid,d1.LaborDeptid) [LaborDept], sum(s.Sales) [TotalSales]
from Sales s
join Departments d1 on s.SalesDept = d1.AssociatedSalesDept
left join Departments d2 on d1.RollUpTo = d2.LaborDeptid
group by s.[Date], coalesce(d2.LaborDeptid,d1.LaborDeptid)

Answer 2

我不得不考虑这一点，但这是一个解决方案：

WITH cte AS (
SELECT CASE WHEN RollUpTo = 0 THEN LaborDeptId ELSE RollUpTo END AS LaborDeptId, AssociatedSalesDept
FROM departments)

SELECT s.date, d.LaborDeptid, SUM(s.Sales) AS TotalSales
FROM Sales s 
INNER JOIN cte d ON s.SalesDept = d.AssociatedSalesDept
GROUP BY s.date, d.LaborDeptid

Answer 3

    SELECT s.Date, 
           d.LaborDeptId,
           SUM(Sales) + ISNULL((SELECT 
                            CASE Departments.RollUpTo
                                WHEN 0 THEN SUM(0)
                                ELSE SUM(Sales)
                            END
                          FROM Departments
                    INNER JOIN Sales ON Departments.AssociatedSalesDept = Sales.SalesDept
                         WHERE Departments.RollUpTo = d.LaborDeptId
                           AND Departments.RollUpTo <> 0
                      GROUP BY Departments.RollUpTo), 0) AS TotalSales
      FROM Departments d 
INNER JOIN Sales s ON d.AssociatedSalesDept = s.SalesDept
     WHERE d.RollUpTo = 0
  GROUP BY s.Date, d.LaborDeptId, d.RollUpTo;

使用子查询的另一个选项。我喜欢DavidN更好。

与条件分组相加

3 个答案: