SQL 计数（不同）

Question

在计数（不同）方面需要帮助，我正在尝试显示不同（MG）项目的计数

    SELECT DISTINCT TOP (50)
    O.ID,
    O.salesarboristidyominame AS Arborist,
    CASE A.accountcategorycode
        WHEN '200000' THEN 'Prospect'
        WHEN '200001' THEN 'Client'
    END AS Category,
    CASE O.proposaltype
        WHEN '1' THEN 'Standard'
        WHEN '2' THEN 'Renewal'
    END AS Proposal_Type,
    O.name AS Opportunity_Number,
    O.proposaldate AS Proposal_Date,
    CASE O.statecode
        WHEN '0' THEN 'Open'
        WHEN '1' THEN 'Won'
        WHEN '2' THEN 'Lost'
    END AS Status,
    O.estimatedvalue,
    O.soldtotal,
    O.unsoldtotal,
    **Count(distinct P.hierarchypath) AS MG_Count**
FROM d365prd_opportunity O
JOIN d365prd_account A
    ON O.soldtoid = A.Id
JOIN d365prd_opportunityproduct OP
    ON O.opportunityid = OP.opportunityid
JOIN d365prd_product P
    ON OP.opportunityproductid = P.productid
WHERE O.proposaldate > '2020-01-01 00:00:00.000'

Msg 8120, Level 16, State 1, Line 2 Column 'd365prd_opportunity.Id' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.

更新我正在尝试将 COUNT 合并到主查询中。 对于这个具体的例子，主查询返回 7 行，所有行都属于 1 MG。 计数查询返回正确的值 1。 我只需要将该 COUNT 以某种方式作为子查询加入到主查询中？

请参阅下面的屏幕截图：

主查询计数查询

Answer 1

您在查询中缺少group by 。 每当您使用count, sum, avg等聚合函数时，您都必须对非聚合列进行group by 。 在where子句后添加以下代码。

group by
    O.ID,
    O.salesarboristidyominame,
    CASE A.accountcategorycode
        WHEN '200000' THEN 'Prospect'
        WHEN '200001' THEN 'Client'
    END
    CASE O.proposaltype
        WHEN '1' THEN 'Standard'
        WHEN '2' THEN 'Renewal'
    END,
    O.name,
    O.proposaldate,
    CASE O.statecode
        WHEN '0' THEN 'Open'
        WHEN '1' THEN 'Won'
        WHEN '2' THEN 'Lost'
    END,
    O.estimatedvalue,
    O.soldtotal,
    O.unsoldtotal