join tables to display posts of people who I follow - mysql

Question

I want to display the posts of people who I follow
The 3 tables I have are:
Users:
+---------+------+
| id_user | name | last_logout
+---------+------+
| 1 | A | 22-02-2018 00:00:10
| 2 | B |
| 3 | C |
| 4 | D |
| 5 | E |
+---------+------+
Community:
+-------------+-------------+
| id_follower | id_followed |
+-------------+-------------+
| 1 | 2 |
| 1 | 3 |
| 1 | 5 |
+-------------+-------------+
Posts:
+---------+--------------+---------------+
| id_post | id_user_post | post | date
+---------+--------------+---------------+
| 1 | 2 | hi |
| 2 | 3 | hello |
| 3 | 5 | hey you |
| 4 | 4 | come on |
| 5 | 5 | where are you | 22-02-2018 00:01:00
+---------+--------------+---------------+
I'm using the following code but it doesn't return anything
SELECT u.name AS n
,p.post AS t
FROM community AS c
LEFT JOIN users AS u ON u.id_user = c.id_followed
LEFT JOIN posts AS p ON c.id_followed = p.id_user_post
WHERE u.id_follower = 1

Answer 1

Users.id_follower does not exist, so that is why you get nothing, in fact you are likely getting an error (Invalid column name 'id_follower'.).
Use Community.id_follower instead. I would also recommend using more descriptive column names (like 'username' and 'comment')
For the pure reason of answering your specific question, I have used 'n' and 't' in the query.
SELECT u.name as n, p.post as t
FROM Community c
LEFT JOIN Users u ON c.id_followed = u.id_user
LEFT JOIN Posts p ON c.id_followed = p.id_user_post
WHERE c.id_follower = 1
Test:
;WITH USERS AS(
SELECT *
FROM (VALUES (1,'A'),
(2,'B'),
(3,'C'),
(4,'D'),
(5,'E')) U(id_user, name))
, Community AS(
SELECT *
FROM (VALUES (1,2),
(1,3),
(1,5)) C(id_follower, id_followed))
, posts AS(
SELECT *
FROM (VALUES (1,2,'hi'),
(2,3,'hello'),
(3,5,'hey you'),
(4,4,'come on'),
(5,5,'where are you')) P(id_post, id_user_post, post))
SELECT u.name as n, p.post as t
FROM Community c
LEFT JOIN Users u ON c.id_followed = u.id_user
LEFT JOIN Posts p ON c.id_followed = p.id_user_post
WHERE c.id_follower = 1