+-------------+------+
| Column Name | Type |
+-------------+------+
| user\_id | int |
| follower\_id | int |
+-------------+------+
(user\_id, follower\_id) is the primary key for this table.
This table contains the IDs of a user and a follower in a social media app where the follower follows the user.
Write an SQL query that will, for each user, return the number of followers.
Return the result table ordered by user_id.
The query result format is in the following example:
Followers table:
+---------+-------------+
| user\_id | follower\_id |
+---------+-------------+
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 2 | 1 |
+---------+-------------+
Result table:
+---------+----------------+
| user\_id | followers\_count|
+---------+----------------+
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
+---------+----------------+
The followers of 0 are {1}
The followers of 1 are {0}
The followers of 2 are {0,1}