我需要确定每个SupportGroupName分组中最高AgentCount的两个字段（SupportGroupName和PMgr）是否匹配。
这是到目前为止我的代码输出的结果，但是我不知道如何编写要实现的代码：
+------------------+---------------------+------------+---------------+
| SupportGroupName | SupportGroupManager | AgentCount | PMgr |
+------------------+---------------------+------------+---------------+
| AE DS | Sarah Smith | 16 | Honey Roth |
| AE DS | Sarah Smith | 5 | Sarah Smith |
| AE DS | Sarah Smith | 1 | Starr Gilley |
| AEOpenstack | Ron Jerrold | 1 | Chris Lattel |
| Agent 360 | Keith Barrone | 1 | Brian Terrell |
| Agent 360 | Keith Barrone | 1 | Kari Sampson |
| Agent 360 | Keith Barrone | 3 | Keith Barrone |
| Agent 360 | Keith Barrone | 2 | Mike Randall |
+------------------+---------------------+------------+---------------+
我可以编写一个CASE语句来比较这两个字段，但不能只比较每个组中最高的座席人数。
SELECT SG.SupportGroupName
, SG.SupportGroupManager
, Count(SGM.SupportGroupAgent) AS AgentCount
, P.ManagerName AS PMgr
FROM ARSystem_Metrics.dbo.BI_CTM_SupportGroup SG
LEFT OUTER JOIN ARSystem_Metrics.dbo.BI_CTM_SupportGroupsAndMembers SGM
on SG.SupportGroupId = SGM.SupportGroupId
LEFT JOIN ARSystem_Metrics.dbo.BI_CTM_People P
ON SGM.SupportGroupAgentCorpId = P.CorporateId
WHERE SG.status = 'Enabled'
and SGM.SupportGroupAssociationId = 'Member'
AND P.status = 'Enabled'
GROUP BY SG.SupportGroupName, SG.SupportGroupManager, P.ManagerName
评论的预期结果：
+-------------------+---------------------+------------+---------------+---------+
| SupportGroupName | SupportGroupManager | AgentCount | PMgr | Match? |
+-------------------+---------------------+------------+---------------+---------+
| AE DS | Sarah Smith | 16 | Honey Roth | No |
| AEOpenstack | Ron Jerrold | 1 | Chris Lattel | No |
| Agent 360 | Keith Barrone | 3 | Keith Barrone | Yes |
+-------------------+---------------------+------------+---------------+---------+