SQL query at least one of something

Question

I have a bunch of Users, each of whom has many Posts. Schema:

Users: id
Posts: user_id, rating

How do I find all Users who have at least one po

Answer 1

You can join the tables to find the relevant users, and use DISTINCT so each user is in the result set at most once even if they have multiple posts with rating > 10:

select distinct u.id,u.username
from users u inner join posts p on u.id = p.user_id 
where p.rating > 10