Hello everyone, I'll like to hear your opinion on the following issue. I have a posts and post_comments table. Posts belong to a group, so there is a group_id column on it. I want to query for all the post_comments of a user for a specific group, so what I am doing now is a INNER JOIN between the two tables. My question is: Is it better to have a group_id column on the post_comments table for optimize search or that's redundant?
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