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https://gitee.com/coder-xiaomo/leetcode-problemset
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92 lines
9.3 KiB
JSON
92 lines
9.3 KiB
JSON
{
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"question": {
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"questionId": "1179",
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"questionFrontendId": "511",
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"categoryTitle": "Database",
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"boundTopicId": 10991,
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"title": "Game Play Analysis I",
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"titleSlug": "game-play-analysis-i",
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"content": "<p>Table: <code>Activity</code></p>\n\n<pre>\n+--------------+---------+\n| Column Name | Type |\n+--------------+---------+\n| player_id | int |\n| device_id | int |\n| event_date | date |\n| games_played | int |\n+--------------+---------+\n(player_id, event_date) is the primary key (combination of columns with unique values) of this table.\nThis table shows the activity of players of some games.\nEach row is a record of a player who logged in and played a number of games (possibly 0) before logging out on someday using some device.\n</pre>\n\n<p> </p>\n\n<p>Write a solution to find the <strong>first login date</strong> for each player.</p>\n\n<p>Return the result table in <strong>any order</strong>.</p>\n\n<p>The result format is in the following example.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> \nActivity table:\n+-----------+-----------+------------+--------------+\n| player_id | device_id | event_date | games_played |\n+-----------+-----------+------------+--------------+\n| 1 | 2 | 2016-03-01 | 5 |\n| 1 | 2 | 2016-05-02 | 6 |\n| 2 | 3 | 2017-06-25 | 1 |\n| 3 | 1 | 2016-03-02 | 0 |\n| 3 | 4 | 2018-07-03 | 5 |\n+-----------+-----------+------------+--------------+\n<strong>Output:</strong> \n+-----------+-------------+\n| player_id | first_login |\n+-----------+-------------+\n| 1 | 2016-03-01 |\n| 2 | 2017-06-25 |\n| 3 | 2016-03-02 |\n+-----------+-------------+\n</pre>\n",
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"translatedTitle": "游戏玩法分析 I",
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"translatedContent": "<p>活动表 <code>Activity</code>：</p>\n\n<pre>\n+--------------+---------+\n| Column Name | Type |\n+--------------+---------+\n| player_id | int |\n| device_id | int |\n| event_date | date |\n| games_played | int |\n+--------------+---------+\n在 SQL 中，表的主键是 (player_id, event_date)。\n这张表展示了一些游戏玩家在游戏平台上的行为活动。\n每行数据记录了一名玩家在退出平台之前，当天使用同一台设备登录平台后打开的游戏的数目（可能是 0 个）。\n</pre>\n\n<p> </p>\n\n<p>查询每位玩家 <strong>第一次登陆平台的日期</strong>。</p>\n\n<p>查询结果的格式如下所示：</p>\n\n<pre>\nActivity 表：\n+-----------+-----------+------------+--------------+\n| player_id | device_id | event_date | games_played |\n+-----------+-----------+------------+--------------+\n| 1 | 2 | 2016-03-01 | 5 |\n| 1 | 2 | 2016-05-02 | 6 |\n| 2 | 3 | 2017-06-25 | 1 |\n| 3 | 1 | 2016-03-02 | 0 |\n| 3 | 4 | 2018-07-03 | 5 |\n+-----------+-----------+------------+--------------+\n\nResult 表：\n+-----------+-------------+\n| player_id | first_login |\n+-----------+-------------+\n| 1 | 2016-03-01 |\n| 2 | 2017-06-25 |\n| 3 | 2016-03-02 |\n+-----------+-------------+\n</pre>\n",
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"difficulty": "Easy",
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"lang": "Pandas",
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"code": "import pandas as pd\n\ndef game_analysis(activity: pd.DataFrame) -> pd.DataFrame:\n ",
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"sampleTestCase": "{\"headers\":{\"Activity\":[\"player_id\",\"device_id\",\"event_date\",\"games_played\"]},\"rows\":{\"Activity\":[[1,2,\"2016-03-01\",5],[1,2,\"2016-05-02\",6],[2,3,\"2017-06-25\",1],[3,1,\"2016-03-02\",0],[3,4,\"2018-07-03\",5]]}}",
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"metaData": "{\"mysql\":[\"Create table If Not Exists Activity (player_id int, device_id int, event_date date, games_played int)\"],\"mssql\":[\"Create table Activity (player_id int, device_id int, event_date date, games_played int)\"],\"oraclesql\":[\"Create table Activity (player_id int, device_id int, event_date date, games_played int)\",\"ALTER SESSION SET nls_date_format='YYYY-MM-DD'\"],\"database\":true,\"name\":\"game_analysis\",\"pythondata\":[\"Activity = pd.DataFrame([], columns=['player_id', 'device_id', 'event_date', 'games_played']).astype({'player_id':'Int64', 'device_id':'Int64', 'event_date':'datetime64[ns]', 'games_played':'Int64'})\"],\"manual\":false,\"postgresql\":[\"Create table If Not Exists Activity (player_id int, device_id int, event_date date, games_played int)\"],\"database_schema\":{\"Activity\":{\"player_id\":\"INT\",\"device_id\":\"INT\",\"event_date\":\"DATE\",\"games_played\":\"INT\"}}}",
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"Create table If Not Exists Activity (player_id int, device_id int, event_date date, games_played int)",
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"Truncate table Activity",
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"insert into Activity (player_id, device_id, event_date, games_played) values ('1', '2', '2016-03-01', '5')",
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"insert into Activity (player_id, device_id, event_date, games_played) values ('1', '2', '2016-05-02', '6')",
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"insert into Activity (player_id, device_id, event_date, games_played) values ('2', '3', '2017-06-25', '1')",
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"insert into Activity (player_id, device_id, event_date, games_played) values ('3', '1', '2016-03-02', '0')",
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"insert into Activity (player_id, device_id, event_date, games_played) values ('3', '4', '2018-07-03', '5')"
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"style": "LEETCODE",
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"exampleTestcases": "{\"headers\":{\"Activity\":[\"player_id\",\"device_id\",\"event_date\",\"games_played\"]},\"rows\":{\"Activity\":[[1,2,\"2016-03-01\",5],[1,2,\"2016-05-02\",6],[2,3,\"2017-06-25\",1],[3,1,\"2016-03-02\",0],[3,4,\"2018-07-03\",5]]}}",
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