"content":"<p>Table: <code>Followers</code></p>\n\n<pre>\n+-------------+------+\n| Column Name | Type |\n+-------------+------+\n| user_id | int |\n| follower_id | int |\n+-------------+------+\n(user_id, follower_id) is the primary key for this table.\nThis table contains the IDs of a user and a follower in a social media app where the follower follows the user.</pre>\n\n<p> </p>\n\n<p>Write an SQL query that will, for each user, return the number of followers.</p>\n\n<p>Return the result table ordered by <code>user_id</code>.</p>\n\n<p>The query result format is in the following example.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> \nFollowers table:\n+---------+-------------+\n| user_id | follower_id |\n+---------+-------------+\n| 0 | 1 |\n| 1 | 0 |\n| 2 | 0 |\n| 2 | 1 |\n+---------+-------------+\n<strong>Output:</strong> \n+---------+----------------+\n| user_id | followers_count|\n+---------+----------------+\n| 0 | 1 |\n| 1 | 1 |\n| 2 | 2 |\n+---------+----------------+\n<strong>Explanation:</strong> \nThe followers of 0 are {1}\nThe followers of 1 are {0}\nThe followers of 2 are {0,1}\n</pre>\n",