Like here, here or here.
SELECT
[TicketId],
STUFF((
SELECT ', ' + [Name])
FROM [OneTable]
WHERE ([TicketId] = OT.[TicketId])
FOR XML PATH(''),TYPE).value('(./text())[1]','VARCHAR(MAX)')
,1,2,'') AS Name
FROM [OneTable] OT
GROUP BY [TicketId]
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solved Getting Data separated by comma, [duplicate]