sql - 分组和计数查询

Question

我有一个查询，我正在尝试分组并计算分组列中有多少，基本上我到目前为止的样子：

CustomerCode 是一个分组列，目前正在计算中，但我需要它做的是按 CustomerCode 分组，然后它也按 DomainCode 分组，因此它将计算所有具有域代码的 CustomerCodes 说 PBM113

到目前为止，我的查询如下所示：

SELECT [330].DomainCode, [329].CustomerCode, Count([329].CustomerCode) AS CallCount
FROM 330 INNER JOIN 329 ON [330].DomainCode = [329].AccreditedDomainCode
WHERE ((([329].CallStatus)='N' Or ([329].CallStatus)='P' Or ([329].CallStatus)='X'))
GROUP BY [330].DomainCode, [329].CustomerCode;

Answer 1

您可以将当前查询用作子查询：

SELECT      DomainCode
        ,   COUNT( CustomerCode )
        ,   SUM( CallCount )
FROM       (
                SELECT      [330].DomainCode
                        ,   [329].CustomerCode
                        ,   Count([329].CustomerCode) AS CallCount
                FROM        330
                INNER JOIN  329
                        ON  [330].DomainCode = [329].AccreditedDomainCode
                WHERE       (   (   ( [329].CallStatus ) = 'N'
                                Or  ( [329].CallStatus ) = 'P'
                                Or  ( [329].CallStatus ) = 'X'
                            )   )
                GROUP BY    [330].DomainCode
                        ,   [329].CustomerCode
            ) AS CustPerDomain
GROUP BY    DomainCode;