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https://gitee.com/coder-xiaomo/leetcode-problemset
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106 lines
19 KiB
JSON
106 lines
19 KiB
JSON
{
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"question": {
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"questionId": "3932",
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"questionFrontendId": "3586",
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"categoryTitle": "Database",
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"boundTopicId": 3701001,
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"title": "Find COVID Recovery Patients",
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"titleSlug": "find-covid-recovery-patients",
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"content": "<p>Table: <code>patients</code></p>\n\n<pre>\n+-------------+---------+\n| Column Name | Type |\n+-------------+---------+\n| patient_id | int |\n| patient_name| varchar |\n| age | int |\n+-------------+---------+\npatient_id is the unique identifier for this table.\nEach row contains information about a patient.\n</pre>\n\n<p>Table: <code>covid_tests</code></p>\n\n<pre>\n+-------------+---------+\n| Column Name | Type |\n+-------------+---------+\n| test_id | int |\n| patient_id | int |\n| test_date | date |\n| result | varchar |\n+-------------+---------+\ntest_id is the unique identifier for this table.\nEach row represents a COVID test result. The result can be Positive, Negative, or Inconclusive.\n</pre>\n\n<p>Write a solution to find patients who have <strong>recovered from COVID</strong> - patients who tested positive but later tested negative.</p>\n\n<ul>\n\t<li>A patient is considered recovered if they have <strong>at least one</strong> <strong>Positive</strong> test followed by at least one <strong>Negative</strong> test on a <strong>later date</strong></li>\n\t<li>Calculate the <strong>recovery time</strong> in days as the <strong>difference</strong> between the <strong>first positive test</strong> and the <strong>first negative test</strong> after that <strong>positive test</strong></li>\n\t<li><strong>Only include</strong> patients who have both positive and negative test results</li>\n</ul>\n\n<p>Return <em>the result table ordered by </em><code>recovery_time</code><em> in <strong>ascending</strong> order, then by </em><code>patient_name</code><em> in <strong>ascending</strong> order</em>.</p>\n\n<p>The result format is in the following example.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong></p>\n\n<p>patients table:</p>\n\n<pre class=\"example-io\">\n+------------+--------------+-----+\n| patient_id | patient_name | age |\n+------------+--------------+-----+\n| 1 | Alice Smith | 28 |\n| 2 | Bob Johnson | 35 |\n| 3 | Carol Davis | 42 |\n| 4 | David Wilson | 31 |\n| 5 | Emma Brown | 29 |\n+------------+--------------+-----+\n</pre>\n\n<p>covid_tests table:</p>\n\n<pre class=\"example-io\">\n+---------+------------+------------+--------------+\n| test_id | patient_id | test_date | result |\n+---------+------------+------------+--------------+\n| 1 | 1 | 2023-01-15 | Positive |\n| 2 | 1 | 2023-01-25 | Negative |\n| 3 | 2 | 2023-02-01 | Positive |\n| 4 | 2 | 2023-02-05 | Inconclusive |\n| 5 | 2 | 2023-02-12 | Negative |\n| 6 | 3 | 2023-01-20 | Negative |\n| 7 | 3 | 2023-02-10 | Positive |\n| 8 | 3 | 2023-02-20 | Negative |\n| 9 | 4 | 2023-01-10 | Positive |\n| 10 | 4 | 2023-01-18 | Positive |\n| 11 | 5 | 2023-02-15 | Negative |\n| 12 | 5 | 2023-02-20 | Negative |\n+---------+------------+------------+--------------+\n</pre>\n\n<p><strong>Output:</strong></p>\n\n<pre class=\"example-io\">\n+------------+--------------+-----+---------------+\n| patient_id | patient_name | age | recovery_time |\n+------------+--------------+-----+---------------+\n| 1 | Alice Smith | 28 | 10 |\n| 3 | Carol Davis | 42 | 10 |\n| 2 | Bob Johnson | 35 | 11 |\n+------------+--------------+-----+---------------+\n</pre>\n\n<p><strong>Explanation:</strong></p>\n\n<ul>\n\t<li><strong>Alice Smith (patient_id = 1):</strong>\n\n\t<ul>\n\t\t<li>First positive test: 2023-01-15</li>\n\t\t<li>First negative test after positive: 2023-01-25</li>\n\t\t<li>Recovery time: 25 - 15 = 10 days</li>\n\t</ul>\n\t</li>\n\t<li><strong>Bob Johnson (patient_id = 2):</strong>\n\t<ul>\n\t\t<li>First positive test: 2023-02-01</li>\n\t\t<li>Inconclusive test on 2023-02-05 (ignored for recovery calculation)</li>\n\t\t<li>First negative test after positive: 2023-02-12</li>\n\t\t<li>Recovery time: 12 - 1 = 11 days</li>\n\t</ul>\n\t</li>\n\t<li><strong>Carol Davis (patient_id = 3):</strong>\n\t<ul>\n\t\t<li>Had negative test on 2023-01-20 (before positive test)</li>\n\t\t<li>First positive test: 2023-02-10</li>\n\t\t<li>First negative test after positive: 2023-02-20</li>\n\t\t<li>Recovery time: 20 - 10 = 10 days</li>\n\t</ul>\n\t</li>\n\t<li><strong>Patients not included:</strong>\n\t<ul>\n\t\t<li>David Wilson (patient_id = 4): Only has positive tests, no negative test after positive</li>\n\t\t<li>Emma Brown (patient_id = 5): Only has negative tests, never tested positive</li>\n\t</ul>\n\t</li>\n</ul>\n\n<p>Output table is ordered by recovery_time in ascending order, and then by patient_name in ascending order.</p>\n</div>\n",
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"translatedTitle": "寻找 COVID 康复患者",
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"translatedContent": "<p>表：<code>patients</code></p>\n\n<pre>\n+-------------+---------+\n| Column Name | Type |\n+-------------+---------+\n| patient_id | int |\n| patient_name| varchar |\n| age | int |\n+-------------+---------+\npatient_id 是这张表的唯一主键。\n每一行表示一个患者的信息。\n</pre>\n\n<p>表：<code>covid_tests</code></p>\n\n<pre>\n+-------------+---------+\n| Column Name | Type |\n+-------------+---------+\n| test_id | int |\n| patient_id | int |\n| test_date | date |\n| result | varchar |\n+-------------+---------+\ntest_id 是这张表的唯一主键。\n每一行代表一个 COVID 检测结果。结果可以是阳性、阴性或不确定。\n</pre>\n\n<p>编写一个解决方案以找到从 COVID 中康复的患者——那些曾经检测呈阳性但后来检测呈阴性的患者。</p>\n\n<ul>\n\t<li>患者如果 <strong>至少有一次阳性</strong> 检测结果后，在 <strong>之后的日期</strong> 至少有一次 <strong>阴性</strong> 检测结果，则被认为已康复。</li>\n\t<li>计算从 <strong>首次阳性检测</strong> 结果到 <strong>该阳性检测</strong> 后的 <strong>首次阴性检测结果</strong> 之间的 <strong>康复时间</strong>（以天为单位）</li>\n\t<li><strong>仅包括 </strong>同时具有阳性及阴性检测结果的患者</li>\n</ul>\n\n<p>返回结果表以<em> </em><code>recovery_time</code><em> </em><strong>升序 </strong>排序，然后以<em> </em><code>patient_name</code><em> </em><strong>升序 </strong>排序。</p>\n\n<p>结果格式如下所示。</p>\n\n<p> </p>\n\n<p><strong class=\"example\">示例：</strong></p>\n\n<div class=\"example-block\">\n<p><strong>输入：</strong></p>\n\n<p>patients 表：</p>\n\n<pre class=\"example-io\">\n+------------+--------------+-----+\n| patient_id | patient_name | age |\n+------------+--------------+-----+\n| 1 | Alice Smith | 28 |\n| 2 | Bob Johnson | 35 |\n| 3 | Carol Davis | 42 |\n| 4 | David Wilson | 31 |\n| 5 | Emma Brown | 29 |\n+------------+--------------+-----+\n</pre>\n\n<p>covid_tests 表：</p>\n\n<pre class=\"example-io\">\n+---------+------------+------------+--------------+\n| test_id | patient_id | test_date | result |\n+---------+------------+------------+--------------+\n| 1 | 1 | 2023-01-15 | Positive |\n| 2 | 1 | 2023-01-25 | Negative |\n| 3 | 2 | 2023-02-01 | Positive |\n| 4 | 2 | 2023-02-05 | Inconclusive |\n| 5 | 2 | 2023-02-12 | Negative |\n| 6 | 3 | 2023-01-20 | Negative |\n| 7 | 3 | 2023-02-10 | Positive |\n| 8 | 3 | 2023-02-20 | Negative |\n| 9 | 4 | 2023-01-10 | Positive |\n| 10 | 4 | 2023-01-18 | Positive |\n| 11 | 5 | 2023-02-15 | Negative |\n| 12 | 5 | 2023-02-20 | Negative |\n+---------+------------+------------+--------------+\n</pre>\n\n<p><strong>输出：</strong></p>\n\n<pre class=\"example-io\">\n+------------+--------------+-----+---------------+\n| patient_id | patient_name | age | recovery_time |\n+------------+--------------+-----+---------------+\n| 1 | Alice Smith | 28 | 10 |\n| 3 | Carol Davis | 42 | 10 |\n| 2 | Bob Johnson | 35 | 11 |\n+------------+--------------+-----+---------------+\n</pre>\n\n<p><strong>解释：</strong></p>\n\n<ul>\n\t<li><strong>Alice Smith (patient_id = 1):</strong>\n\n\t<ul>\n\t\t<li>首次阳性检测：2023-01-15</li>\n\t\t<li>阳性检测后的首次阴性检测：2023-01-25</li>\n\t\t<li>康复时间：25 - 15 = 10 天</li>\n\t</ul>\n\t</li>\n\t<li><strong>Bob Johnson (patient_id = 2):</strong>\n\t<ul>\n\t\t<li>首次阳性检测：2023-02-01</li>\n\t\t<li>测试结果不明确：2023-02-05（忽略计算康复时间）</li>\n\t\t<li>阳性检测后的首次阴性检测：2023-02-12</li>\n\t\t<li>康复时间：12 - 1 = 11 天</li>\n\t</ul>\n\t</li>\n\t<li><strong>Carol Davis (patient_id = 3):</strong>\n\t<ul>\n\t\t<li>检测呈阴性：2023-01-20（在阳性检测前）</li>\n\t\t<li>首次阳性检测：2023-02-10</li>\n\t\t<li>阳性检测后的首次阴性检测：2023-02-20</li>\n\t\t<li>康复时间：20 - 10 = 10 天</li>\n\t</ul>\n\t</li>\n\t<li><strong>没有包含的患者：</strong>\n\t<ul>\n\t\t<li>David Wilson（patient_id = 4）：只有阳性检测，之后没有阴性检测。</li>\n\t\t<li>Emma Brown（patient_id = 5）：只有阴性检测，从未有阳性检测。</li>\n\t</ul>\n\t</li>\n</ul>\n\n<p>输出表以 recovery_time 升序排序，然后以 patient_name 升序排序。</p>\n</div>\n",
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"sampleTestCase": "{\"headers\":{\"patients\":[\"patient_id\",\"patient_name\",\"age\"],\"covid_tests\":[\"test_id\",\"patient_id\",\"test_date\",\"result\"]},\"rows\":{\"patients\":[[1,\"Alice Smith\",28],[2,\"Bob Johnson\",35],[3,\"Carol Davis\",42],[4,\"David Wilson\",31],[5,\"Emma Brown\",29]],\"covid_tests\":[[1,1,\"2023-01-15\",\"Positive\"],[2,1,\"2023-01-25\",\"Negative\"],[3,2,\"2023-02-01\",\"Positive\"],[4,2,\"2023-02-05\",\"Inconclusive\"],[5,2,\"2023-02-12\",\"Negative\"],[6,3,\"2023-01-20\",\"Negative\"],[7,3,\"2023-02-10\",\"Positive\"],[8,3,\"2023-02-20\",\"Negative\"],[9,4,\"2023-01-10\",\"Positive\"],[10,4,\"2023-01-18\",\"Positive\"],[11,5,\"2023-02-15\",\"Negative\"],[12,5,\"2023-02-20\",\"Negative\"]]}}",
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"CREATE TABLE patients (\n patient_id INT,\n patient_name VARCHAR(255),\n age INT\n)",
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"CREATE TABLE covid_tests (\n test_id INT,\n patient_id INT,\n test_date DATE,\n result VARCHAR(50)\n)",
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"Truncate table patients",
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"insert into patients (patient_id, patient_name, age) values ('1', 'Alice Smith', '28')",
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"insert into patients (patient_id, patient_name, age) values ('2', 'Bob Johnson', '35')",
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"insert into patients (patient_id, patient_name, age) values ('3', 'Carol Davis', '42')",
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"insert into patients (patient_id, patient_name, age) values ('4', 'David Wilson', '31')",
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"insert into patients (patient_id, patient_name, age) values ('5', 'Emma Brown', '29')",
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"Truncate table covid_tests",
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"insert into covid_tests (test_id, patient_id, test_date, result) values ('1', '1', '2023-01-15', 'Positive')",
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"insert into covid_tests (test_id, patient_id, test_date, result) values ('2', '1', '2023-01-25', 'Negative')",
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"insert into covid_tests (test_id, patient_id, test_date, result) values ('3', '2', '2023-02-01', 'Positive')",
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"insert into covid_tests (test_id, patient_id, test_date, result) values ('4', '2', '2023-02-05', 'Inconclusive')",
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"insert into covid_tests (test_id, patient_id, test_date, result) values ('5', '2', '2023-02-12', 'Negative')",
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"insert into covid_tests (test_id, patient_id, test_date, result) values ('6', '3', '2023-01-20', 'Negative')",
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"insert into covid_tests (test_id, patient_id, test_date, result) values ('7', '3', '2023-02-10', 'Positive')",
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"insert into covid_tests (test_id, patient_id, test_date, result) values ('8', '3', '2023-02-20', 'Negative')",
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"insert into covid_tests (test_id, patient_id, test_date, result) values ('9', '4', '2023-01-10', 'Positive')",
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"insert into covid_tests (test_id, patient_id, test_date, result) values ('10', '4', '2023-01-18', 'Positive')",
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"insert into covid_tests (test_id, patient_id, test_date, result) values ('11', '5', '2023-02-15', 'Negative')",
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"insert into covid_tests (test_id, patient_id, test_date, result) values ('12', '5', '2023-02-20', 'Negative')"
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