leetcode-problemset/leetcode-cn/originData/find-followers-count.json

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        "question": {
            "questionId": "1877",
            "questionFrontendId": "1729",
            "categoryTitle": "Database",
            "boundTopicId": 564380,
            "title": "Find Followers Count",
            "titleSlug": "find-followers-count",
            "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>&nbsp;</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>&nbsp;</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",
            "translatedTitle": "求关注者的数量",
            "translatedContent": "<p>表：&nbsp;<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) 是这个表的主键。\n该表包含一个关注关系中关注者和用户的编号，其中关注者关注用户。</pre>\n\n<p>&nbsp;</p>\n\n<p>写出 SQL 语句，对于每一个用户，返回该用户的关注者数量。</p>\n\n<p>按&nbsp;<code>user_id</code>&nbsp;的顺序返回结果表。</p>\n\n<p>查询结果的格式如下示例所示。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>\nFollowers 表：\n+---------+-------------+\n| user_id | follower_id |\n+---------+-------------+\n| 0       | 1           |\n| 1       | 0           |\n| 2       | 0           |\n| 2       | 1           |\n+---------+-------------+\n<strong>输出：</strong>\n+---------+----------------+\n| user_id | followers_count|\n+---------+----------------+\n| 0       | 1              |\n| 1       | 1              |\n| 2       | 2              |\n+---------+----------------+\n<strong>解释：</strong>\n0 的关注者有 {1}\n1 的关注者有 {0}\n2 的关注者有 {0,1}</pre>\n",
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            "difficulty": "Easy",
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                    "lang": "MySQL",
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                    "code": "# Write your MySQL query statement below",
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            "status": null,
            "sampleTestCase": "{\"headers\":{\"Followers\":[\"user_id\",\"follower_id\"]},\"rows\":{\"Followers\":[[\"0\",\"1\"],[\"1\",\"0\"],[\"2\",\"0\"],[\"2\",\"1\"]]}}",
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            "mysqlSchemas": [
                "Create table If Not Exists Followers(user_id int, follower_id int)",
                "Truncate table Followers",
                "insert into Followers (user_id, follower_id) values ('0', '1')",
                "insert into Followers (user_id, follower_id) values ('1', '0')",
                "insert into Followers (user_id, follower_id) values ('2', '0')",
                "insert into Followers (user_id, follower_id) values ('2', '1')"
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            "exampleTestcases": "{\"headers\":{\"Followers\":[\"user_id\",\"follower_id\"]},\"rows\":{\"Followers\":[[\"0\",\"1\"],[\"1\",\"0\"],[\"2\",\"0\"],[\"2\",\"1\"]]}}",
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