Tsql T-SQL-如何在xml对象上使用GROUPBY

我已经编写了以下查询，我希望返回一个数据集，如查询中所述

质疑

预期结果

我收到一个错误，说

列“Audit.EventData.Data”在选择列表中无效，因为它 未包含在聚合函数或GROUP BY中 条款

如果我尝试对xml数据进行分组，则会出现另一个错误，即

GROUPBY子句中不允许使用XML方法

有办法解决这个问题吗

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谢谢

您可以将其添加到CTE中

;with cte as (
SELECT 
 RelatedRecordID AS [OrganisationID], 
 Data.value('(//OpportunityViewEvent/Title)[1]','nvarchar(255)') AS   OpportunityTitle,
 Data.value('(//OpportunityViewEvent/ID)[1]','int') AS OpportunityID,
 Data.value('(//OpportunityViewEvent/ID)[1]','int') as visit
FROM [Audit].[EventData]
LEFT OUTER JOIN Employed.Organisation AS ORG ON [EventData].RelatedRecordID = ORG.ID
Where EventTypeID = 4 )
select OrganisationID, opportunityTitle, opportunityId,  count(visit) as Visits from cte 
Group BY OrganisationID, opportunityTitle, opportunityId 

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“选择”在“分组依据”之后处理。如果你想对select的结果进行分组，你应该使用子查询，例如select。。。从选择。。。来自EventData x GROUP By…感谢您的建议，我也将尝试这种方式。

+-----------------+-----------------+---------------+--------+
| OrganisationID  | OpportunityTitle | OpportunityID | Visits |  
+-----------------+------------------+---------------+--------+
|              23 | Plumber          |           122 |    567 |  
|              65 | Accountant       |            34 |    288 | 
|              12 | Developer        |            81 |    100 | 
|              45 | Driver           |            22 |     96 | 
+-----------------+------------------+---------------+--------+

;with cte as (
SELECT 
 RelatedRecordID AS [OrganisationID], 
 Data.value('(//OpportunityViewEvent/Title)[1]','nvarchar(255)') AS   OpportunityTitle,
 Data.value('(//OpportunityViewEvent/ID)[1]','int') AS OpportunityID,
 Data.value('(//OpportunityViewEvent/ID)[1]','int') as visit
FROM [Audit].[EventData]
LEFT OUTER JOIN Employed.Organisation AS ORG ON [EventData].RelatedRecordID = ORG.ID
Where EventTypeID = 4 )
select OrganisationID, opportunityTitle, opportunityId,  count(visit) as Visits from cte 
Group BY OrganisationID, opportunityTitle, opportunityId