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add leetcode problem-cn part1
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‎算法题（国内版）/originData/[no content]active-businesses.json

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{
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"data": {
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"questionId": "1225",
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"questionFrontendId": "1126",
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"boundTopicId": 33222,
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"title": "Active Businesses",
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"titleSlug": "active-businesses",
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"content": null,
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"translatedTitle": "查询活跃业务",
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"translatedContent": null,
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"sampleTestCase": "{\"headers\":{\"Events\":[\"business_id\",\"event_type\",\"occurences\"]},\"rows\":{\"Events\":[[1,\"reviews\",7],[3,\"reviews\",3],[1,\"ads\",11],[2,\"ads\",7],[3,\"ads\",6],[1,\"page views\",3],[2,\"page views\",12]]}}",
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"Create table If Not Exists Events (business_id int, event_type varchar(10), occurences int)",
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"Truncate table Events",
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"insert into Events (business_id, event_type, occurences) values ('1', 'reviews', '7')",
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"insert into Events (business_id, event_type, occurences) values ('3', 'reviews', '3')",
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"insert into Events (business_id, event_type, occurences) values ('1', 'ads', '11')",
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"insert into Events (business_id, event_type, occurences) values ('2', 'ads', '7')",
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"insert into Events (business_id, event_type, occurences) values ('3', 'ads', '6')",
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"insert into Events (business_id, event_type, occurences) values ('1', 'page views', '3')",
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"insert into Events (business_id, event_type, occurences) values ('2', 'page views', '12')"
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],
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"exampleTestcases": "{\"headers\":{\"Events\":[\"business_id\",\"event_type\",\"occurences\"]},\"rows\":{\"Events\":[[1,\"reviews\",7],[3,\"reviews\",3],[1,\"ads\",11],[2,\"ads\",7],[3,\"ads\",6],[1,\"page views\",3],[2,\"page views\",12]]}}",
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‎算法题（国内版）/originData/[no content]active-users.json

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{
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"data": {
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"questionId": "1579",
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"title": "Active Users",
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"titleSlug": "active-users",
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"content": null,
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"translatedTitle": "活跃用户",
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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 ('1', 'Winston')",
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"insert into Accounts (id, name) values ('7', 'Jonathan')",
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"Truncate table Logins",
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"insert into Logins (id, login_date) values ('7', '2020-05-30')",
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"insert into Logins (id, login_date) values ('1', '2020-05-30')",
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"insert into Logins (id, login_date) values ('7', '2020-05-31')",
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"insert into Logins (id, login_date) values ('7', '2020-06-01')",
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"insert into Logins (id, login_date) values ('7', '2020-06-02')",
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"insert into Logins (id, login_date) values ('7', '2020-06-02')",
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"insert into Logins (id, login_date) values ('7', '2020-06-03')",
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"insert into Logins (id, login_date) values ('1', '2020-06-07')",
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"insert into Logins (id, login_date) values ('7', '2020-06-10')"
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],
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"enableRunCode": true,
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"exampleTestcases": "{\"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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}
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}

‎算法题（国内版）/originData/[no content]activity-participants.json

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{
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"data": {
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"question": {
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"questionId": "1494",
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"questionFrontendId": "1355",
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"categoryTitle": "Database",
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"title": "Activity Participants",
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"titleSlug": "activity-participants",
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"content": null,
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"translatedTitle": "活动参与者",
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"difficulty": "Medium",
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"likes": 24,
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"stats": "{\"totalAccepted\": \"5K\", \"totalSubmission\": \"7.5K\", \"totalAcceptedRaw\": 5015, \"totalSubmissionRaw\": 7512, \"acRate\": \"66.8%\"}",
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"hints": [],
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"solution": null,
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"status": null,
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"sampleTestCase": "{\"headers\": {\"Friends\": [\"id\", \"name\", \"activity\"], \"Activities\": [\"id\", \"name\"]}, \"rows\": {\"Friends\": [[1, \"Jonathan D.\", \"Eating\"], [2, \"Jade W.\", \"Singing\"], [3, \"Victor J.\", \"Singing\"], [4, \"Elvis Q.\", \"Eating\"], [5, \"Daniel A.\", \"Eating\"], [6, \"Bob B.\", \"Horse Riding\"]], \"Activities\": [[1, \"Eating\"], [2, \"Singing\"], [3, \"Horse Riding\"]]}}",
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"metaData": "{\n \"mysql\": [\n \"Create table If Not Exists Friends (id int, name varchar(30), activity varchar(30))\",\n \"Create table If Not Exists Activities (id int, name varchar(30))\"\n ],\n \"mssql\": [\n \"Create table Friends (id int, name varchar(30), activity varchar(30))\",\n \"Create table Activities (id int, name varchar(30))\"\n ],\n \"oraclesql\": [\n \"Create table Friends (id int, name varchar(30), activity varchar(30))\",\n \"Create table Activities (id int, name varchar(30))\"\n ],\n \"database\": true\n}",
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"judgerAvailable": true,
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"Create table If Not Exists Friends (id int, name varchar(30), activity varchar(30))",
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"Create table If Not Exists Activities (id int, name varchar(30))",
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"Truncate table Friends",
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"insert into Friends (id, name, activity) values ('1', 'Jonathan D.', 'Eating')",
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"insert into Friends (id, name, activity) values ('2', 'Jade W.', 'Singing')",
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"insert into Friends (id, name, activity) values ('3', 'Victor J.', 'Singing')",
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"insert into Friends (id, name, activity) values ('4', 'Elvis Q.', 'Eating')",
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"insert into Friends (id, name, activity) values ('5', 'Daniel A.', 'Eating')",
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"insert into Friends (id, name, activity) values ('6', 'Bob B.', 'Horse Riding')",
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"Truncate table Activities",
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"insert into Activities (id, name) values ('1', 'Eating')",
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"insert into Activities (id, name) values ('2', 'Singing')",
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"insert into Activities (id, name) values ('3', 'Horse Riding')"
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‎算法题（国内版）/originData/[no content]ads-performance.json

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"questionId": "1453",
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"boundTopicId": 76185,
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"title": "Ads Performance",
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"titleSlug": "ads-performance",
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"content": null,
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"translatedTitle": "广告效果",
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"difficulty": "Easy",
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"likes": 33,
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"sampleTestCase": "{\"headers\":{\"Ads\":[\"ad_id\",\"user_id\",\"action\"]},\"rows\":{\"Ads\":[[1,1,\"Clicked\"],[2,2,\"Clicked\"],[3,3,\"Viewed\"],[5,5,\"Ignored\"],[1,7,\"Ignored\"],[2,7,\"Viewed\"],[3,5,\"Clicked\"],[1,4,\"Viewed\"],[2,11,\"Viewed\"],[1,2,\"Clicked\"]]}}",
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"Create table If Not Exists Ads (ad_id int, user_id int, action ENUM('Clicked', 'Viewed', 'Ignored'))",
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"insert into Ads (ad_id, user_id, action) values ('2', '2', 'Clicked')",
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"insert into Ads (ad_id, user_id, action) values ('3', '3', 'Viewed')",
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"insert into Ads (ad_id, user_id, action) values ('5', '5', 'Ignored')",
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"insert into Ads (ad_id, user_id, action) values ('1', '7', 'Ignored')",
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"insert into Ads (ad_id, user_id, action) values ('2', '7', 'Viewed')",
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"insert into Ads (ad_id, user_id, action) values ('3', '5', 'Clicked')",
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"insert into Ads (ad_id, user_id, action) values ('1', '4', 'Viewed')",
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"insert into Ads (ad_id, user_id, action) values ('2', '11', 'Viewed')",
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"insert into Ads (ad_id, user_id, action) values ('1', '2', 'Clicked')"
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