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100 lines
6.9 KiB
JSON
100 lines
6.9 KiB
JSON
{
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"question": {
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"questionId": "596",
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"questionFrontendId": "596",
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"boundTopicId": null,
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"title": "Classes More Than 5 Students",
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"titleSlug": "classes-more-than-5-students",
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"content": "<p>Table: <code>Courses</code></p>\n\n<pre>\n+-------------+---------+\n| Column Name | Type |\n+-------------+---------+\n| student | varchar |\n| class | varchar |\n+-------------+---------+\n(student, class) is the primary key (combination of columns with unique values) for this table.\nEach row of this table indicates the name of a student and the class in which they are enrolled.\n</pre>\n\n<p> </p>\n\n<p>Write a solution to find all the classes that have <strong>at least five students</strong>.</p>\n\n<p>Return the result table in <strong>any order</strong>.</p>\n\n<p>The result format is in the following example.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> \nCourses table:\n+---------+----------+\n| student | class |\n+---------+----------+\n| A | Math |\n| B | English |\n| C | Math |\n| D | Biology |\n| E | Math |\n| F | Computer |\n| G | Math |\n| H | Math |\n| I | Math |\n+---------+----------+\n<strong>Output:</strong> \n+---------+\n| class |\n+---------+\n| Math |\n+---------+\n<strong>Explanation:</strong> \n- Math has 6 students, so we include it.\n- English has 1 student, so we do not include it.\n- Biology has 1 student, so we do not include it.\n- Computer has 1 student, so we do not include it.\n</pre>\n",
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"translatedTitle": null,
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"difficulty": "Easy",
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"likes": 936,
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"similarQuestions": "[]",
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"exampleTestcases": "{\"headers\": {\"Courses\": [\"student\", \"class\"]}, \"rows\": {\"Courses\": [[\"A\", \"Math\"], [\"B\", \"English\"], [\"C\", \"Math\"], [\"D\", \"Biology\"], [\"E\", \"Math\"], [\"F\", \"Computer\"], [\"G\", \"Math\"], [\"H\", \"Math\"], [\"I\", \"Math\"]]}}",
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"categoryTitle": "Database",
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"contributors": [],
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{
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"name": "Database",
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{
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"lang": "MySQL",
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"langSlug": "mysql",
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"code": "# Write your MySQL query statement below\n",
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},
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{
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"lang": "MS SQL Server",
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"langSlug": "mssql",
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"code": "/* Write your T-SQL query statement below */\n",
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"__typename": "CodeSnippetNode"
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},
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{
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"lang": "Oracle",
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"langSlug": "oraclesql",
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"code": "/* Write your PL/SQL query statement below */\n",
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"__typename": "CodeSnippetNode"
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},
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{
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"lang": "Pandas",
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"langSlug": "pythondata",
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"code": "import pandas as pd\n\ndef find_classes(courses: pd.DataFrame) -> pd.DataFrame:\n ",
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"__typename": "CodeSnippetNode"
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},
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{
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"lang": "PostgreSQL",
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"langSlug": "postgresql",
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"code": "-- Write your PostgreSQL query statement below\n",
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"__typename": "CodeSnippetNode"
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}
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],
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"stats": "{\"totalAccepted\": \"327.1K\", \"totalSubmission\": \"628.5K\", \"totalAcceptedRaw\": 327073, \"totalSubmissionRaw\": 628481, \"acRate\": \"52.0%\"}",
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"hints": [],
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"solution": {
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},
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"status": null,
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"sampleTestCase": "{\"headers\": {\"Courses\": [\"student\", \"class\"]}, \"rows\": {\"Courses\": [[\"A\", \"Math\"], [\"B\", \"English\"], [\"C\", \"Math\"], [\"D\", \"Biology\"], [\"E\", \"Math\"], [\"F\", \"Computer\"], [\"G\", \"Math\"], [\"H\", \"Math\"], [\"I\", \"Math\"]]}}",
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"metaData": "{\"mysql\": [\"Create table If Not Exists Courses (student varchar(255), class varchar(255))\"], \"mssql\": [\"Create table Courses (student varchar(255), class varchar(255))\"], \"oraclesql\": [\"Create table Courses (student varchar(255), class varchar(255))\"], \"database\": true, \"name\": \"find_classes\", \"pythondata\": [\"Courses = pd.DataFrame([], columns=['student', 'class']).astype({'student':'object', 'class':'object'})\"], \"postgresql\": [\"Create table If Not Exists Courses (student varchar(255), class varchar(255))\"], \"database_schema\": {\"Courses\": {\"student\": \"VARCHAR(255)\", \"class\": \"VARCHAR(255)\"}}}",
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"judgeType": "large",
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"mysqlSchemas": [
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"Create table If Not Exists Courses (student varchar(255), class varchar(255))",
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"Truncate table Courses",
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"insert into Courses (student, class) values ('A', 'Math')",
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"insert into Courses (student, class) values ('B', 'English')",
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"insert into Courses (student, class) values ('C', 'Math')",
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"insert into Courses (student, class) values ('D', 'Biology')",
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"insert into Courses (student, class) values ('E', 'Math')",
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"insert into Courses (student, class) values ('F', 'Computer')",
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"insert into Courses (student, class) values ('G', 'Math')",
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"insert into Courses (student, class) values ('H', 'Math')",
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"insert into Courses (student, class) values ('I', 'Math')"
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],
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"enableRunCode": true,
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"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>\"], \"pythondata\": [\"Pandas\", \"<p>Python 3.10 with Pandas 2.0.2 and NumPy 1.25.0</p>\"], \"postgresql\": [\"PostgreSQL\", \"<p>PostgreSQL 16</p>\"]}",
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