MySQL one-to-many join with Group By only returns one observation

Question

I have a comment table and a tag table. For each comment, there could be multiple tags, or none. I want to join the two so I can get a list of tags for each comment.

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Answer 1

You don't need the group by for this situation:

SELECT c.CommentID, c.Title,  t.TagID  FROM Comment as c
LEFT OUTER JOIN Tag as t ON c.CommentID = t.CommentID