{
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        "question": {
            "questionId": "1579",
            "questionFrontendId": "1454",
            "categoryTitle": "Database",
            "boundTopicId": 258463,
            "title": "Active Users",
            "titleSlug": "active-users",
            "content": null,
            "translatedTitle": "活跃用户",
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            "hints": [],
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            "sampleTestCase": "{\"headers\":{\"Accounts\":[\"id\",\"name\"],\"Logins\":[\"id\",\"login_date\"]},\"rows\":{\"Accounts\":[[1,\"Winston\"],[7,\"Jonathan\"]],\"Logins\":[[7,\"2020-05-30\"],[1,\"2020-05-30\"],[7,\"2020-05-31\"],[7,\"2020-06-01\"],[7,\"2020-06-02\"],[7,\"2020-06-02\"],[7,\"2020-06-03\"],[1,\"2020-06-07\"],[7,\"2020-06-10\"]]}}",
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                "insert into Accounts (id, name) values ('7', 'Jonathan')",
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                "insert into Logins (id, login_date) values ('1', '2020-05-30')",
                "insert into Logins (id, login_date) values ('7', '2020-05-31')",
                "insert into Logins (id, login_date) values ('7', '2020-06-01')",
                "insert into Logins (id, login_date) values ('7', '2020-06-02')",
                "insert into Logins (id, login_date) values ('7', '2020-06-02')",
                "insert into Logins (id, login_date) values ('7', '2020-06-03')",
                "insert into Logins (id, login_date) values ('1', '2020-06-07')",
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