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zhangbk1
2024-04-30 10:04:49 +08:00
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"categoryTitle": "Database",
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"title": "Find Longest Calls",
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"content": null,
"translatedTitle": "查找最长的电话",
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"Truncate table Contacts",
"insert into Contacts (id, first_name, last_name) values ('1', 'John', 'Doe')",
"insert into Contacts (id, first_name, last_name) values ('2', 'Jane', 'Smith')",
"insert into Contacts (id, first_name, last_name) values ('3', 'Alice', 'Johnson')",
"insert into Contacts (id, first_name, last_name) values ('4', 'Michael', 'Brown')",
"insert into Contacts (id, first_name, last_name) values ('5', 'Emily', 'Davis')",
"Truncate table Calls",
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"insert into Calls (contact_id, type, duration) values ('1', 'outgoing', '180')",
"insert into Calls (contact_id, type, duration) values ('2', 'incoming', '300')",
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"insert into Calls (contact_id, type, duration) values ('4', 'incoming', '420')",
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"title": "Friday Purchase III ",
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"insert into Purchases (user_id, purchase_date, amount_spend) values ('17', '2023-11-17', '2414')",
"insert into Purchases (user_id, purchase_date, amount_spend) values ('12', '2023-11-24', '9692')",
"insert into Purchases (user_id, purchase_date, amount_spend) values ('8', '2023-11-24', '5117')",
"insert into Purchases (user_id, purchase_date, amount_spend) values ('1', '2023-11-24', '5241')",
"insert into Purchases (user_id, purchase_date, amount_spend) values ('10', '2023-11-22', '8266')",
"insert into Purchases (user_id, purchase_date, amount_spend) values ('13', '2023-11-21', '12000')",
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"insert into Users (user_id, membership) values ('12', 'VIP')",
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{
"data": {
"question": {
"questionId": "3440",
"questionFrontendId": "3126",
"categoryTitle": "Database",
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"title": "Server Utilization Time",
"titleSlug": "server-utilization-time",
"content": "<p>Table: <code>Servers</code></p>\n\n<pre>\n+----------------+----------+\n| Column Name | Type |\n+----------------+----------+\n| server_id | int |\n| status_time | datetime |\n| session_status | enum |\n+----------------+----------+\n(server_id, status_time, session_status) is the primary key (combination of columns with unique values) for this table.\nsession_status is an ENUM (category) type of (&#39;start&#39;, &#39;stop&#39;).\nEach row of this table contains server_id, status_time, and session_status.\n</pre>\n\n<p>Write a solution to find the <strong>total time</strong> when servers were <strong>running</strong>. The output should be rounded down to the nearest number of&nbsp;<strong>full days</strong>.</p>\n\n<p>Return <em>the result table in <strong>any</strong></em><em>&nbsp;order.</em></p>\n\n<p>The result format is in the following example.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong></p>\n\n<p>Servers table:</p>\n\n<pre class=\"example-io\">\n+-----------+---------------------+----------------+\n| server_id | status_time | session_status |\n+-----------+---------------------+----------------+\n| 3 | 2023-11-04 16:29:47 | start |\n| 3 | 2023-11-05 01:49:47 | stop |\n| 3 | 2023-11-25 01:37:08 | start |\n| 3 | 2023-11-25 03:50:08 | stop |\n| 1 | 2023-11-13 03:05:31 | start |\n| 1 | 2023-11-13 11:10:31 | stop |\n| 4 | 2023-11-29 15:11:17 | start |\n| 4 | 2023-11-29 15:42:17 | stop |\n| 4 | 2023-11-20 00:31:44 | start |\n| 4 | 2023-11-20 07:03:44 | stop |\n| 1 | 2023-11-20 00:27:11 | start |\n| 1 | 2023-11-20 01:41:11 | stop |\n| 3 | 2023-11-04 23:16:48 | start |\n| 3 | 2023-11-05 01:15:48 | stop |\n| 4 | 2023-11-30 15:09:18 | start |\n| 4 | 2023-11-30 20:48:18 | stop |\n| 4 | 2023-11-25 21:09:06 | start |\n| 4 | 2023-11-26 04:58:06 | stop |\n| 5 | 2023-11-16 19:42:22 | start |\n| 5 | 2023-11-16 21:08:22 | stop |\n+-----------+---------------------+----------------+\n</pre>\n\n<p><strong>Output:</strong></p>\n\n<pre class=\"example-io\">\n+-------------------+\n| total_uptime_days |\n+-------------------+\n| 1 |\n+-------------------+\n</pre>\n\n<p><strong>Explanation:</strong></p>\n\n<ul>\n\t<li>For server ID 3:\n\t<ul>\n\t\t<li>From 2023-11-04 16:29:47 to 2023-11-05 01:49:47: ~9.3 hours</li>\n\t\t<li>From 2023-11-25 01:37:08 to 2023-11-25 03:50:08: ~2.2 hours</li>\n\t\t<li>From 2023-11-04 23:16:48 to 2023-11-05 01:15:48: ~1.98 hours</li>\n\t</ul>\n\tTotal for server 3: ~13.48 hours</li>\n\t<li>For server ID 1:\n\t<ul>\n\t\t<li>From 2023-11-13 03:05:31 to 2023-11-13 11:10:31: ~8 hours</li>\n\t\t<li>From 2023-11-20 00:27:11 to 2023-11-20 01:41:11: ~1.23 hours</li>\n\t</ul>\n\tTotal for server 1: ~9.23 hours</li>\n\t<li>For server ID 4:\n\t<ul>\n\t\t<li>From 2023-11-29 15:11:17 to 2023-11-29 15:42:17: ~0.52 hours</li>\n\t\t<li>From 2023-11-20 00:31:44 to 2023-11-20 07:03:44: ~6.53 hours</li>\n\t\t<li>From 2023-11-30 15:09:18 to 2023-11-30 20:48:18: ~5.65 hours</li>\n\t\t<li>From 2023-11-25 21:09:06 to 2023-11-26 04:58:06: ~7.82 hours</li>\n\t</ul>\n\tTotal for server 4: ~20.52 hours</li>\n\t<li>For server ID 5:\n\t<ul>\n\t\t<li>From 2023-11-16 19:42:22 to 2023-11-16 21:08:22: ~1.43 hours</li>\n\t</ul>\n\tTotal for server 5: ~1.43 hours</li>\n</ul>\nThe accumulated runtime for all servers totals approximately 44.46 hours, equivalent to one full day plus some additional hours. However, since we consider only full days, the final output is rounded to 1 full day.</div>\n",
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