SQL Query (STUFF) - sql

Question

This is what I did:
SELECT
[tbl_flw].[question_id], [tbl_flw].[project_id],
[tbl_flw].[follow_up_ans], [tbl_flw].[follow_up_ques],
[t1].[question] AS current_ques,
[t2].[question] AS followUp_ques,
displayname = STUFF((SELECT ', ' + [tbl_ques].[question]
FROM [tbl_flw]
LEFT JOIN [tbl_ques] ON [tbl_ques].[question_id] = [tbl_flw].[follow_up_ques]
WHERE [tbl_flw].[follow_up_ques] = [tbl_ques].[question_id]
FOR XML PATH('')), 1, 2, '')
FROM
[tbl_flw]
INNER JOIN
[tbl_ques] t1 ON t1.question_id = [tbl_flw].[question_id]
INNER JOIN
[tbl_ques] t2 ON t2.question_id = [tbl_flw].[follow_up_ques]
WHERE
[project_id] = 162
This is the result
This is how I want:
But I'm trying to put it like this:
How to change the SQL query so it will be like result above (displayname column)

Answer 1

I can't copy your sql code so I'll give you some example.
If you want to concat columns by group you can use GROUP_CONCAT function like this
SELECT pub_id,GROUP_CONCAT(cate_id)
FROM book_mast
GROUP BY pub_id;
If you want to use a seperator
SELECT pub_id,GROUP_CONCAT(cate_id SEPERATOR ',')
FROM book_mast
GROUP BY pub_id;
And if you want to order the group and use concat unique values
SELECT pub_id,GROUP_CONCAT(DISTINCT cate_id ORDER BY cate_id ASC SEPERATOR ',')
FROM book_mast
GROUP BY pub_id;
edit : this should work
SELECT [tbl_flw].[question_id], [tbl_flw].[project_id], [tbl_flw].[follow_up_ans],
[tbl_flw].[follow_up_ques], [t1].[question] AS current_ques, [t2].[question] AS followUp_ques,
displayname = STUFF((SELECT ', ' + [tbl_ques].[question] FROM [tbl_flw]
LEFT JOIN [tbl_ques] ON [tbl_ques].[question_id] = [tbl_flw].[follow_up_ques]
WHERE[tbl_flw].[follow_up_ques] = [tbl_ques].[question_id] AND [t1].[question] = [tbl_ques].[question] FOR XML PATH('')), 1, 2, '')
FROM [tbl_flw]
INNER JOIN [tbl_ques] t1 ON t1.question_id = [tbl_flw].[question_id]
INNER JOIN [tbl_ques] t2 ON t2.question_id = [tbl_flw].[follow_up_ques]
WHERE [project_id] = 162