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Editorial Team
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Asked: 2026-05-18T08:22:03+00:00

Right now I have two tables for getting a timeline of posts that a

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Right now I have two tables for getting a timeline of posts that a user follows in MySQL, timeline and follows.

In the ‘follows’ table, there is the ‘follows.follow_From’ column, the ‘follows.follow_To’ columns to show where the follows are from.

In the timeline table, there is a ‘timeline.post_From’ column containing the author’s user ID of the post.

What is the most efficient method of selecting all posts from ‘timeline’ only where the current user has a “follow” in the ‘follows’ table? I am currently using a MySQL array, but I don’t see it as efficient. Thank you for reading this and your help!

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1 Answer

  1. Editorial Team

    I’m not an expert and it might not be the most efficient but I’d guess:

    1. SELECT follow_To FROM follows WHERE follow_From = ‘user-id’
    2. SELECT * FROM timeline WHERE timeline.post_From = (the results above)

    e.g. SELECT * FROM timeline WHERE timeline.post_From IN (SELECT follow_To FROM follows WHERE follow_From = ‘user-id’)

    Doing the other way round would definitely be slower because your processing more data then cutting it down. Cutting the data down first then look up is better.

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