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小墨
2022-05-02 23:44:12 +08:00
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leetcode-cn/originData/user-activity-for-the-past-30-days-i.json
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@@ -12,7 +12,7 @@
"translatedContent": "<p>活动记录表：<code>Activity</code></p>\n\n<pre>\n+---------------+---------+\n| Column Name | Type |\n+---------------+---------+\n| user_id | int |\n| session_id | int |\n| activity_date | date |\n| activity_type | enum |\n+---------------+---------+\n该表是用户在社交网站的活动记录。\n该表没有主键，可能包含重复数据。\nactivity_type 字段为以下四种值 ('open_session', 'end_session', 'scroll_down', 'send_message')。\n每个 session_id 只属于一个用户。\n</pre>\n\n<p>&nbsp;</p>\n\n<p>请写SQL查询出截至&nbsp;<code>2019-07-27</code>（包含2019-07-27），近<strong>&nbsp;</strong><code>30</code> 天的每日活跃用户数（当天只要有一条活动记录，即为活跃用户）。</p>\n\n<p>以 <strong>任意顺序</strong> 返回结果表。</p>\n\n<p>查询结果示例如下。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1:</strong></p>\n\n<pre>\n<strong>输入：</strong>\nActivity table:\n+---------+------------+---------------+---------------+\n| user_id | session_id | activity_date | activity_type |\n+---------+------------+---------------+---------------+\n| 1 | 1 | 2019-07-20 | open_session |\n| 1 | 1 | 2019-07-20 | scroll_down |\n| 1 | 1 | 2019-07-20 | end_session |\n| 2 | 4 | 2019-07-20 | open_session |\n| 2 | 4 | 2019-07-21 | send_message |\n| 2 | 4 | 2019-07-21 | end_session |\n| 3 | 2 | 2019-07-21 | open_session |\n| 3 | 2 | 2019-07-21 | send_message |\n| 3 | 2 | 2019-07-21 | end_session |\n| 4 | 3 | 2019-06-25 | open_session |\n| 4 | 3 | 2019-06-25 | end_session |\n+---------+------------+---------------+---------------+\n<strong>输出：</strong>\n+------------+--------------+ \n| day | active_users |\n+------------+--------------+ \n| 2019-07-20 | 2 |\n| 2019-07-21 | 2 |\n+------------+--------------+ <strong>\n解释：</strong>注意非活跃用户的记录不需要展示。</pre>\n",
"isPaidOnly": false,
"difficulty": "Easy",
"likes": 26,
"likes": 32,
"dislikes": 0,
"isLiked": null,
"similarQuestions": "[]",
@@ -47,7 +47,7 @@
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"hints": [],
"solution": null,
"status": null,