{
    "data": {
        "question": {
            "questionId": "1246",
            "questionFrontendId": "1142",
            "boundTopicId": null,
            "title": "User Activity for the Past 30 Days II",
            "titleSlug": "user-activity-for-the-past-30-days-ii",
            "content": null,
            "translatedTitle": null,
            "translatedContent": null,
            "isPaidOnly": true,
            "difficulty": "Easy",
            "likes": 69,
            "dislikes": 281,
            "isLiked": null,
            "similarQuestions": "[]",
            "exampleTestcases": "{\"headers\":{\"Activity\":[\"user_id\",\"session_id\",\"activity_date\",\"activity_type\"]},\"rows\":{\"Activity\":[[1,1,\"2019-07-20\",\"open_session\"],[1,1,\"2019-07-20\",\"scroll_down\"],[1,1,\"2019-07-20\",\"end_session\"],[2,4,\"2019-07-20\",\"open_session\"],[2,4,\"2019-07-21\",\"send_message\"],[2,4,\"2019-07-21\",\"end_session\"],[3,2,\"2019-07-21\",\"open_session\"],[3,2,\"2019-07-21\",\"send_message\"],[3,2,\"2019-07-21\",\"end_session\"],[3,5,\"2019-07-21\",\"open_session\"],[3,5,\"2019-07-21\",\"scroll_down\"],[3,5,\"2019-07-21\",\"end_session\"],[4,3,\"2019-06-25\",\"open_session\"],[4,3,\"2019-06-25\",\"end_session\"]]}}",
            "categoryTitle": "Database",
            "contributors": [],
            "topicTags": [
                {
                    "name": "Database",
                    "slug": "database",
                    "translatedName": null,
                    "__typename": "TopicTagNode"
                }
            ],
            "companyTagStats": null,
            "codeSnippets": null,
            "stats": "{\"totalAccepted\": \"30K\", \"totalSubmission\": \"83.4K\", \"totalAcceptedRaw\": 29966, \"totalSubmissionRaw\": 83385, \"acRate\": \"35.9%\"}",
            "hints": [],
            "solution": null,
            "status": null,
            "sampleTestCase": "{\"headers\":{\"Activity\":[\"user_id\",\"session_id\",\"activity_date\",\"activity_type\"]},\"rows\":{\"Activity\":[[1,1,\"2019-07-20\",\"open_session\"],[1,1,\"2019-07-20\",\"scroll_down\"],[1,1,\"2019-07-20\",\"end_session\"],[2,4,\"2019-07-20\",\"open_session\"],[2,4,\"2019-07-21\",\"send_message\"],[2,4,\"2019-07-21\",\"end_session\"],[3,2,\"2019-07-21\",\"open_session\"],[3,2,\"2019-07-21\",\"send_message\"],[3,2,\"2019-07-21\",\"end_session\"],[3,5,\"2019-07-21\",\"open_session\"],[3,5,\"2019-07-21\",\"scroll_down\"],[3,5,\"2019-07-21\",\"end_session\"],[4,3,\"2019-06-25\",\"open_session\"],[4,3,\"2019-06-25\",\"end_session\"]]}}",
            "metaData": "{\n  \"mysql\": [\n    \"Create table If Not Exists Activity (user_id int, session_id int, activity_date date, activity_type ENUM('open_session', 'end_session', 'scroll_down', 'send_message'))\"\n  ],\n  \"mssql\": [\n    \"create table Activity (user_id int, session_id int, activity_date date, activity_type varchar(15) not null check(activity_type in ('open_session', 'end_session', 'scroll_down', 'send_message')))\"\n  ],\n  \"oraclesql\": [\n    \"create table Activity (user_id int, session_id int, activity_date date, activity_type varchar(15) not null check(activity_type in ('open_session', 'end_session', 'scroll_down', 'send_message')))\",\n    \"ALTER SESSION SET nls_date_format='YYYY-MM-DD'\"\n  ],\n  \"database\": true\n}",
            "judgerAvailable": true,
            "judgeType": "large",
            "mysqlSchemas": [
                "Create table If Not Exists Activity (user_id int, session_id int, activity_date date, activity_type ENUM('open_session', 'end_session', 'scroll_down', 'send_message'))",
                "Truncate table Activity",
                "insert into Activity (user_id, session_id, activity_date, activity_type) values ('1', '1', '2019-07-20', 'open_session')",
                "insert into Activity (user_id, session_id, activity_date, activity_type) values ('1', '1', '2019-07-20', 'scroll_down')",
                "insert into Activity (user_id, session_id, activity_date, activity_type) values ('1', '1', '2019-07-20', 'end_session')",
                "insert into Activity (user_id, session_id, activity_date, activity_type) values ('2', '4', '2019-07-20', 'open_session')",
                "insert into Activity (user_id, session_id, activity_date, activity_type) values ('2', '4', '2019-07-21', 'send_message')",
                "insert into Activity (user_id, session_id, activity_date, activity_type) values ('2', '4', '2019-07-21', 'end_session')",
                "insert into Activity (user_id, session_id, activity_date, activity_type) values ('3', '2', '2019-07-21', 'open_session')",
                "insert into Activity (user_id, session_id, activity_date, activity_type) values ('3', '2', '2019-07-21', 'send_message')",
                "insert into Activity (user_id, session_id, activity_date, activity_type) values ('3', '2', '2019-07-21', 'end_session')",
                "insert into Activity (user_id, session_id, activity_date, activity_type) values ('3', '5', '2019-07-21', 'open_session')",
                "insert into Activity (user_id, session_id, activity_date, activity_type) values ('3', '5', '2019-07-21', 'scroll_down')",
                "insert into Activity (user_id, session_id, activity_date, activity_type) values ('3', '5', '2019-07-21', 'end_session')",
                "insert into Activity (user_id, session_id, activity_date, activity_type) values ('4', '3', '2019-06-25', 'open_session')",
                "insert into Activity (user_id, session_id, activity_date, activity_type) values ('4', '3', '2019-06-25', 'end_session')"
            ],
            "enableRunCode": true,
            "enableTestMode": false,
            "enableDebugger": false,
            "envInfo": "{\"mysql\": [\"MySQL\", \"<p><code>MySQL 8.0</code>.</p>\"], \"mssql\": [\"MS SQL Server\", \"<p><code>mssql server 2019</code>.</p>\"], \"oraclesql\": [\"Oracle\", \"<p><code>Oracle Sql 11.2</code>.</p>\"]}",
            "libraryUrl": null,
            "adminUrl": null,
            "challengeQuestion": null,
            "__typename": "QuestionNode"
        }
    }
}