SQL Server - 来自不同表的 CTE 递归 SUM 值

我有一个表，其中的数据分层存储在名为 CsOrganization 的表中，如下表所示。

Table Name : CsOrganization
OrgId   OrgParentId    OrgName
1       NULL           X COMPANY
2       1              Administrator
3       2              Adm 1
4       2              Adm 2
5       3              Adm 1_1

然后有一个名为 EmHisOrganization 的表，它与 CsOrganization 表相关，如下表所示。

Table Name : EmHisOrganization
EmpId   OrgId
1       2
2       2
3       3
4       4
5       5

每个员工都将拥有基于他们所在组织的加类数据，并将其存储在 EmOvertime 表中。

Table Name : EmOvertime
EmpId   TotalOtReal
1       1.00
2       2.00
3       3.00
4       2.00
5       1.00

问题是我需要根据每个组织获得 TotalHours 的总和。 TotalHours 的总和还必须对其所有子项的 TotalHours 数据求和。 到目前为止，我设法找出他们的 parent 和 child ，但我无法弄清楚如何从不同的表中获取 TotalHours 数据并对其进行求和。据我所知，我需要加入这些表才能获得 TotalHours，但不幸的是，CTE Recursive 不允许在语法中使用 OUTER JOIN。这是我想要的基于上述示例的输出:

Desired Output
OrgId      OrgName       TotalHours
1          X COMPANY     9.00
2          Administrator 9.00
3          Adm 1         4.00
4          Adm 2         2.00
5          Adm 1_1       1.00

请注意，Adm 1 的 TotalHours 来自 ID 为 3 的总和，其在 TotalHours 列中的值为 3.00，而 ID 为 5 的员工在 TotalHours 列中的值为 1.00，结果在所需表中为 4.00。当 OrgId 的 ID 为 1 和 2 的 TotalHours 中的值为 9.00 时，情况也是如此。

任何帮助将不胜感激。

于 09/05/2016, 12.02 编辑，添加了表和我的查询尝试的关系。

这是关系的外观: Table Relationship 。

我的查询尝试(这些结果在每个组织上为 0.00，但如果不推荐使用 where 子句，则 anchor 查询显示正确的值):

With OrgTree (OrgId, OrgName, TotalHours) AS
(
SELECT      orgId, orgN, SUM(eReal) AS TotalHours
FROM        (SELECT OrgId AS orgId, OrgName AS orgN, CASE WHEN x.TotalOtReal IS NULL THEN 0 ELSE x.TotalOtReal END AS eReal
FROM        (SELECT f.OrgId, f.OrgName, o.TotalOtReal
FROM        dbo.CsOrganization AS f LEFT OUTER JOIN
(SELECT     OrgId, SUM(TotalOtReal) AS TotalOtReal
FROM        (SELECT a.EmpId, a.OrgId, b.TotalOtReal
FROM        dbo.EmHisOrganization AS a LEFT OUTER JOIN
(SELECT     EmpId, SUM(TotalOtReal) AS TotalOtReal
FROM        dbo.EmOvertime AS a
GROUP BY EmpId) AS b ON a.EmpId = b.EmpId) AS a_1
GROUP BY OrgId) AS o ON f.OrgId = o.OrgId
) AS x WHERE OrgId = 1) AS xx
GROUP BY orgId, orgN

UNION ALL
SELECT a.OrgId, a.OrgName, TotalHours FROM dbo.CsOrganization a
INNER JOIN OrgTree o ON a.OrgParentId = o.OrgId
)
SELECT a.OrgId, a.OrgName, SUM(a.TotalHours) AS TotalHours FROM OrgTree a
GROUP BY a.OrgId, a.OrgName

最佳答案

样本数据

DECLARE @CsOrganization TABLE (OrgId int, OrgParentId int, OrgName nvarchar(50));
INSERT INTO @CsOrganization (OrgId, OrgParentId, OrgName) VALUES
(1, NULL, 'X COMPANY'),
(2, 1   , 'Administrator'),
(3, 2   , 'Adm 1'),
(4, 2   , 'Adm 2'),
(5, 3   , 'Adm 1_1');

DECLARE @EmHisOrganization TABLE (EmpId int, OrgId int);
INSERT INTO @EmHisOrganization (EmpId, OrgId) VALUES
(1, 2),
(2, 2),
(3, 3),
(4, 4),
(5, 5);

DECLARE @EmOvertime TABLE (EmpId int, TotalOtReal float);
INSERT INTO @EmOvertime (EmpId, TotalOtReal) VALUES
(1, 1.00),
(2, 2.00),
(3, 3.00),
(4, 2.00),
(5, 1.00);

查询

CTE_OrgHours 计算每个组织所有员工的加类时间的简单总和。

CTE_Recursive 是遍历组织层次结构的递归 CTE。

最终的 SELECT 将遍历的树分组到树的每个节点(组织)的总小时数。

逐步运行此查询，逐个 CTE 并检查中间结果以更好地了解其工作原理。

WITH
CTE_OrgHours
AS
(
    SELECT
        Org.OrgId
        ,Org.OrgParentId
        ,Org.OrgName
        ,ISNULL(SUM(Overtime.TotalOtReal), 0) AS SumHours
    FROM
        @CsOrganization AS Org
        LEFT JOIN @EmHisOrganization AS Emp ON Emp.OrgId = Org.OrgID
        LEFT JOIN @EmOvertime AS Overtime ON Overtime.EmpId = Emp.EmpId
    GROUP BY
        Org.OrgId
        ,Org.OrgParentId
        ,Org.OrgName
)
,CTE_Recursive
AS
(
    SELECT
         CTE_OrgHours.OrgId
        ,CTE_OrgHours.OrgParentId
        ,CTE_OrgHours.OrgName
        ,CTE_OrgHours.SumHours
        ,1 AS Lvl
        ,CTE_OrgHours.OrgId AS StartOrgId
        ,CTE_OrgHours.OrgName AS StartOrgName
    FROM CTE_OrgHours

    UNION ALL

    SELECT
         CTE_OrgHours.OrgId
        ,CTE_OrgHours.OrgParentId
        ,CTE_OrgHours.OrgName
        ,CTE_OrgHours.SumHours
        ,CTE_Recursive.Lvl + 1 AS Lvl
        ,CTE_Recursive.StartOrgId
        ,CTE_Recursive.StartOrgName
    FROM
        CTE_OrgHours
        INNER JOIN CTE_Recursive ON CTE_Recursive.OrgId = CTE_OrgHours.OrgParentId
)
SELECT
    StartOrgId
    ,StartOrgName
    ,SUM(SumHours) AS TotalHours
FROM CTE_Recursive
GROUP BY
    StartOrgId
    ,StartOrgName
ORDER BY StartOrgId;

结果

+------------+---------------+------------+
| StartOrgId | StartOrgName  | TotalHours |
+------------+---------------+------------+
|          1 | X COMPANY     |          9 |
|          2 | Administrator |          9 |
|          3 | Adm 1         |          4 |
|          4 | Adm 2         |          2 |
|          5 | Adm 1_1       |          1 |
+------------+---------------+------------+

关于SQL Server - 来自不同表的 CTE 递归 SUM 值，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/37107678/

totalHours

SQL Server - 来自不同表的 CTE 递归 SUM 值