How would I get one id and not the other in the case of the following?

```
SELECT
    posts.id,
    posts.topic,
    posts.content,
    posts.date,
    posts.author,
    users.id,
    users.name,
    users.posts

```

When I get an id, it returns the user id, but I want the post id. How would I specify which one I want? I tried ["posts.id"] which apparently doesn't work.