TSQL Group By Issue causing duplicates - tsql

Question

I have a query that I created which outputs projects as well as who is presenting the project. My issue is that I am trying to group the presenters to the project ID so it lists the presenters under the project ID and not include it multiple times.
Here is my query:
DECLARE #agendaID AS INT = '23';
SELECT
(SELECT att.empID,
emp.firstName,
emp.lastName,
emp.ntid
FROM dbo.BS_ProjectReview_Attendees AS att
LEFT OUTER JOIN
dbo.EmployeeTable AS emp
ON att.empID = emp.EmpID
WHERE att.agendaID = #agendaID
FOR XML PATH ('attendee'), TYPE, ELEMENTS, ROOT ('attendees')),
(SELECT pres.intID,
int.intTitle,
(SELECT emp.firstName,
emp.lastName,
emp.ntid
FROM dbo.EmployeeTable AS emp
WHERE emp.EmpID = pres.empID
FOR XML PATH ('presenter'), TYPE, ELEMENTS, ROOT ('presenters'))
FROM dbo.BS_ProjectReview_ProjectPresenters AS pres
INNER JOIN dbo.BS_Initiatives AS int
ON pres.intID = int.intID
WHERE pres.agendaID = #agendaID
GROUP BY int.intID <----- ISSUE IS HERE
FOR XML PATH ('project'), TYPE, ELEMENTS, ROOT ('projects'))
FOR XML PATH ('data'), TYPE, ELEMENTS, ROOT ('root');
Here is my XML OUTPUT:
<root>
<data>
<attendees>
<attendee>
<empID>1234</empID>
<firstName>Mike</firstName>
<lastName>Smith</lastName>
<ntid>msmith</ntid>
</attendee>
</attendees>
<projects>
<project>
<intID>202</intID>
<intTitle>Infrastructure Expansion</intTitle>
<presenters>
<presenter>
<firstName>Bob</firstName>
<lastName>Jones</lastName>
<ntid>bjones</ntid>
</presenter>
</presenters>
</project>
<project>
<intID>202</intID>
<intTitle>Infrastructure Expansion</intTitle>
<presenters>
<presenter>
<firstName>User 1</firstName>
<lastName>Last 1</lastName>
<ntid>ulast1</ntid>
</presenter>
</presenters>
</project>
</projects>
</data>
</root>
Here is the desired output:
<root>
<data>
<attendees>
<attendee>
<empID>1234</empID>
<firstName>Mike</firstName>
<lastName>Smith</lastName>
<ntid>msmith</ntid>
</attendee>
</attendees>
<projects>
<project>
<intID>202</intID>
<intTitle>Infrastructure Expansion</intTitle>
<presenters>
<presenter>
<firstName>Bob</firstName>
<lastName>Jones</lastName>
<ntid>bjones</ntid>
</presenter>
<presenter>
<firstName>User 1</firstName>
<lastName>Last 1</lastName>
<ntid>ulast1</ntid>
</presenter>
</presenters>
</project>
</projects>
</data>
</root>
It should be listing both presenters under the same intID however its duplicating them.
I am getting an error with the group by clause as its not contained in an aggregate function and wants me to include pres.empID but then it would not make it unique as they are all different.
Any ideas?

Answer 1

This may be solved using this, however, since SQLFiddle is down ATM, no example.
DECLARE #agendaID AS INT = '23';
SELECT
(SELECT att.empID,
emp.firstName,
emp.lastName,
emp.ntid
FROM dbo.BS_ProjectReview_Attendees AS att
LEFT OUTER JOIN
dbo.EmployeeTable AS emp
ON att.empID = emp.EmpID
WHERE att.agendaID = #agendaID
FOR XML PATH ('attendee'), TYPE, ELEMENTS, ROOT ('attendees')),
(SELECT pres.intID,
int.intTitle,
(SELECT emp.firstName,
emp.lastName,
emp.ntid
FROM dbo.EmployeeTable AS emp
INNER JOIN dbo.BS_ProjectReview_ProjectPresenters AS pres ON emp.EmpID = pres.empID
WHERE pres.intID = int.intID
FOR XML PATH ('presenter'), TYPE, ELEMENTS, ROOT ('presenters'))
FROM dbo.BS_Initiatives AS int
WHERE #agendaID IN ( SELECT pres.agendaID FROM dbo.BS_ProjectReview_ProjectPresenters AS pres WHERE pres.intID = int.intID)
FOR XML PATH ('project'), TYPE, ELEMENTS, ROOT ('projects'))
FOR XML PATH ('data'), TYPE, ELEMENTS, ROOT ('root');