Question

I have two columns called topic_id and post_id, and what I want to do is find every row where the topic_id is the lowest for each post ID.

For example
topic_id post_id
1 5
2 5
3 8
4 8

So it would grab row 1 and 3.

I am not even sure where to begin so any help would be greatly appreciated.

Answer 1

select post_id, min(topic_id)
    from YourTable
    group by post_id