Combining rows in T-SQL using STUFF or CONCAT command - sql-server

Question

I am looking at modifying the following query in a program (this was written before my time here as Software Engineer so please bear with me...):
SELECT
Participant.ParticipantID AS "ParticipantId",
Stream.StreamName AS "StreamName",
ParticipantStatistics.ConnectTime AS "ConnectTime",
ParticipantStatistics.DisconnectTime AS "DisconnectTime",
FormField.FieldLabel AS "FieldLabel",
RegistrantAnswer.Answer AS "Answer"
FROM ParticipantStatistics
INNER JOIN Participant ON ParticipantStatistics.ParticipantId = Participant.ParticipantID
INNER JOIN Registrant ON Registrant.RegistrantId = Participant.RegistrantID
LEFT OUTER JOIN RegistrantAnswer ON RegistrantAnswer.RegistrantID = Registrant.RegistrantID
INNER JOIN Event ON Event.EventId = Participant.EventID
INNER JOIN Stream ON Stream.MediaEventId = Event.EventId
LEFT OUTER JOIN FormField ON RegistrantAnswer.FormFieldId = FormField.FormFieldId
LEFT OUTER JOIN (SELECT DISTINCT ParticipantID, SurveyID FROM ParticipantSurvey)
AS SurveyCompleted ON SurveyCompleted.ParticipantID = Participant.ParticipantID
WHERE Stream.StreamId = '2235'
AND Participant.Visible = 1
ORDER BY Participant.ParticipantID, OrderNumber, ParticipantStatistics.ConnectTime ASC
This query gives me the following information:
What I would like to do is modify the above query to return the results as one row as follows:
| 315314 | ffbc110729 | 2011-10-27 03:13:06.240 | 2011-10-27 03:17:12.473 | **First Name, Last Name, Email, Company** | **ads, asd, asd#asd.com, asdf** |
Where the last two columns are combined, separated by commas in a single row.
Is this possible using either STUFF or CONCAT? I am new to T-SQL so please let me know if you need further clarification.
Best Regards,
EDIT: When I try to edit with STUFF FOR XML PATH I set it up the following way:
SELECT
Participant.ParticipantID AS "ParticipantId",
Stream.StreamName AS "StreamName",
ParticipantStatistics.ConnectTime AS "ConnectTime",
ParticipantStatistics.DisconnectTime AS "DisconnectTime",
STUFF ((SELECT ','+ FormField.FieldLabel FROM FormField WHERE FormField.FormFieldID = RegistrantAnswer.FormFieldID FOR XML PATH ('')),1,1,'')
FROM ParticipantStatistics
INNER JOIN Participant ON ParticipantStatistics.ParticipantId = Participant.ParticipantID
INNER JOIN Registrant ON Registrant.RegistrantId = Participant.RegistrantID
LEFT OUTER JOIN RegistrantAnswer ON RegistrantAnswer.RegistrantID = Registrant.RegistrantID
INNER JOIN Event ON Event.EventId = Participant.EventID
INNER JOIN Stream ON Stream.MediaEventId = Event.EventId
LEFT OUTER JOIN FormField ON RegistrantAnswer.FormFieldId = FormField.FormFieldId
LEFT OUTER JOIN (SELECT DISTINCT ParticipantID, SurveyID FROM ParticipantSurvey)
AS SurveyCompleted ON SurveyCompleted.ParticipantID = Participant.ParticipantID
WHERE Stream.StreamId = '2235'
AND Participant.Visible = 1
ORDER BY Participant.ParticipantID, OrderNumber, ParticipantStatistics.ConnectTime ASC
I then receive the following:
Again, I am fairly new to T-SQL so maybe I am setting it up wrong? Any help is greatly appreciated.

Answer 1

Try something like this:
SELECT
Participant.ParticipantID AS "ParticipantId",
Stream.StreamName AS "StreamName",
ParticipantStatistics.ConnectTime AS "ConnectTime",
ParticipantStatistics.DisconnectTime AS "DisconnectTime",
STUFF(
(SELECT ', ' + FormField.FieldLabel as'text()'
FROM Registrant
LEFT OUTER JOIN RegistrantAnswer ON RegistrantAnswer.RegistrantID = Registrant.RegistrantID
LEFT OUTER JOIN FormField ON RegistrantAnswer.FormFieldId = FormField.FormFieldId
WHERE Registrant.RegistrantId = Participant.RegistrantID
FOR XML PATH('')
), 1, 2, '') AS "FieldLabel",
STUFF(
(SELECT ', ' + RegistrantAnswer.Answer as'text()'
FROM Registrant
LEFT OUTER JOIN RegistrantAnswer ON RegistrantAnswer.RegistrantID = Registrant.RegistrantID
WHERE Registrant.RegistrantId = Participant.RegistrantID
FOR XML PATH('')
), 1, 2, '') AS "Answer"
FROM ParticipantStatistics
INNER JOIN Participant ON ParticipantStatistics.ParticipantId = Participant.ParticipantID
INNER JOIN Registrant ON Registrant.RegistrantId = Participant.RegistrantID
INNER JOIN Event ON Event.EventId = Participant.EventID
INNER JOIN Stream ON Stream.MediaEventId = Event.EventId
WHERE Stream.StreamId = '2235'
AND Participant.Visible = 1
ORDER BY Participant.ParticipantID, OrderNumber, ParticipantStatistics.ConnectTime ASC

Answer 2

Using STUFF + FOR XML PATH('') is usually the most practical in SQL Server to concatenate strings. This sample first populates the resultset in an intermediary temporary table for the sake of keeping things readable and manageable.
SELECT *
INTO #fiddle_table
FROM (
VALUES
(315314,'ffbc110729',{ts '2011-10-27 03:13:06.240'},{ts '2011-10-27 03:17:12.473'},'First Name','ads'),
(315314,'ffbc110729',{ts '2011-10-27 03:13:06.240'},{ts '2011-10-27 03:17:12.473'},'Last Name','asd'),
(315314,'ffbc110729',{ts '2011-10-27 03:13:06.240'},{ts '2011-10-27 03:17:12.473'},'Email','asd#asd.com'),
(315314,'ffbc110729',{ts '2011-10-27 03:13:06.240'},{ts '2011-10-27 03:17:12.473'},'Company','asdf')
) AS v(participantid,streamname,connecttime,disconnecttime,fieldlabel,answer);
;WITH cte AS (
SELECT DISTINCT
participantid,streamname,connecttime,disconnecttime
FROM
#fiddle_table
)
SELECT
participantid,streamname,connecttime,disconnecttime,
fieldlabels=STUFF((
SELECT ', '+fieldlabel
FROM #fiddle_table AS i
WHERE i.participantid=o.participantid
FOR XML PATH('')
),1,2,''
),
answers=STUFF((
SELECT ', '+answer
FROM #fiddle_table AS i
WHERE i.participantid=o.participantid
FOR XML PATH('')
),1,2,''
)
FROM cte AS o;
DROP TABLE #fiddle_table;
Result:
+---------------+------------+-------------------------+-------------------------+---------------------------------------+-----------------------------+
| participantid | streamname | connecttime | disconnecttime | fieldlabels | answers |
+---------------+------------+-------------------------+-------------------------+---------------------------------------+-----------------------------+
| 315314 | ffbc110729 | 2011-10-27 03:13:06.240 | 2011-10-27 03:17:12.473 | First Name, Last Name, Email, Company | ads, asd, asd#asd.com, asdf |
+---------------+------------+-------------------------+-------------------------+---------------------------------------+-----------------------------+