Fetchxml 如何在 groupby fetch 中获取多个属性（聚合）

Question

我有一个 fetchxml，在我向 fetch 添加另一个属性之前它工作正常。

 <attribute name="ey_b_closed_conversations" alias="isClosed" />

这是我添加到 fetch 中的行，现在不起作用。以下代码是完整的fetchxml。

<fetch mapping="logical" version="1.0" aggregate="true" distinct="false"> 
  <entity name="ey_case_branch_callcenter_inquiry">
    <attribute name="ey_s_name" alias="count" aggregate="countcolumn" /> 
    <attribute name="ey_p_action" alias="id" groupby="true" /> 
    <attribute name="ey_b_closed_conversations" alias="isClosed" />  
      <filter>     
     <condition attribute="ey_case_sub_subjectid" operator="eq" value="{9E52CB8E-BEA6-E411-AFFF-0050568C0143}" />
    <condition attribute="statecode" operator="eq" value="0" />       
    </filter>     
  </entity>   
</fetch>

我可以在聚合的 fetchxml 中获取的属性数量是否有任何限制？如何将我的附加（非聚合）属性添加到提取中？

Answer 1

Are there any limitations on the number of attributes I can fetch in an aggregated fetchxml?

没有

How can I add my additional (non-aggregated) attribute to the fetch?

你不能。

您可能收到此错误：An attribute can not be requested when an aggregate operation has been specified and its neither groupby nor aggregate.

这类似于 SQL 错误：Column 'xxxx' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.

出现此错误是因为您查询中的以下行中没有 groupby 或 aggregate 属性。

<attribute name="ey_b_closed_conversations" alias="isClosed" />

引用 this community post：

This is because when you group by you can only include an attribute that you are not grouping-by as an aggregate ( E.g sum/min/max/count)

我测试了以下内容并且有效：

<fetch mapping="logical" version="1.0" aggregate="true" distinct="false" >
  <entity name="account" >
    <attribute name="name" alias="count" aggregate="countcolumn" />
    <attribute name="telephone2" alias="phone" groupby="true" />
    <attribute name="telephone1" alias="mobile" aggregate="count" />
    <attribute name="accountnumber" alias="number" groupby="true" />
    <filter>
      <condition attribute="statecode" operator="eq" value="0" />
    </filter>
  </entity>
</fetch>

SQL相当于：

SELECT   count(name) AS count,
         count(telephone1) AS mobile,
         telephone2 AS phone,
         accountnumber AS number
FROM     account
WHERE    statecode = 0
GROUP BY telephone2, accountnumber

所以要么这样做：

<attribute name="ey_b_closed_conversations" alias="isClosed" aggregate="count" />

或

<attribute name="ey_b_closed_conversations" alias="isClosed" groupby="true" />

Fetchxml 如何在 groupby fetch 中获取多个属性（聚合）

Fetchxml How to fetch multiple attributes in a groupby fetch (aggregate)

group-by

aggregate

dynamics-crm

fetchxml

dynamics-crm-2011