{
    "data": {
        "question": {
            "questionId": "196",
            "questionFrontendId": "196",
            "boundTopicId": null,
            "title": "Delete Duplicate Emails",
            "titleSlug": "delete-duplicate-emails",
            "content": "<p>Table: <code>Person</code></p>\n\n<pre>\n+-------------+---------+\n| Column Name | Type    |\n+-------------+---------+\n| id          | int     |\n| email       | varchar |\n+-------------+---------+\nid is the primary key column for this table.\nEach row of this table contains an email. The emails will not contain uppercase letters.\n</pre>\n\n<p>&nbsp;</p>\n\n<p>Write an SQL query to <strong>delete</strong> all the duplicate emails, keeping only one unique email with the smallest <code>id</code>. Note that you are supposed to write a <code>DELETE</code> statement and not a <code>SELECT</code> one.</p>\n\n<p>Return the result table in <strong>any order</strong>.</p>\n\n<p>The query result format is in the following example.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> \nPerson table:\n+----+------------------+\n| id | email            |\n+----+------------------+\n| 1  | john@example.com |\n| 2  | bob@example.com  |\n| 3  | john@example.com |\n+----+------------------+\n<strong>Output:</strong> \n+----+------------------+\n| id | email            |\n+----+------------------+\n| 1  | john@example.com |\n| 2  | bob@example.com  |\n+----+------------------+\n<strong>Explanation:</strong> john@example.com is repeated two times. We keep the row with the smallest Id = 1.\n</pre>\n",
            "translatedTitle": null,
            "translatedContent": null,
            "isPaidOnly": false,
            "difficulty": "Easy",
            "likes": 777,
            "dislikes": 1250,
            "isLiked": null,
            "similarQuestions": "[]",
            "exampleTestcases": "{\"headers\": {\"Person\": [\"id\", \"email\"]}, \"rows\": {\"Person\": [[1, \"john@example.com\"], [2, \"bob@example.com\"], [3, \"john@example.com\"]]}}",
            "categoryTitle": "Database",
            "contributors": [],
            "topicTags": [
                {
                    "name": "Database",
                    "slug": "database",
                    "translatedName": null,
                    "__typename": "TopicTagNode"
                }
            ],
            "companyTagStats": null,
            "codeSnippets": [
                {
                    "lang": "MySQL",
                    "langSlug": "mysql",
                    "code": "# Please write a DELETE statement and DO NOT write a SELECT statement.\n# Write your MySQL query statement below\n",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "MS SQL Server",
                    "langSlug": "mssql",
                    "code": "/* \n Please write a DELETE statement and DO NOT write a SELECT statement.\n Write your T-SQL query statement below\n */\n",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "Oracle",
                    "langSlug": "oraclesql",
                    "code": "/*\n Please write a DELETE statement and DO NOT write a SELECT statement.\n Write your PL/SQL query statement below\n */\n",
                    "__typename": "CodeSnippetNode"
                }
            ],
            "stats": "{\"totalAccepted\": \"205.6K\", \"totalSubmission\": \"400.3K\", \"totalAcceptedRaw\": 205553, \"totalSubmissionRaw\": 400288, \"acRate\": \"51.4%\"}",
            "hints": [],
            "solution": {
                "id": "210",
                "canSeeDetail": true,
                "paidOnly": false,
                "hasVideoSolution": false,
                "paidOnlyVideo": true,
                "__typename": "ArticleNode"
            },
            "status": null,
            "sampleTestCase": "{\"headers\": {\"Person\": [\"id\", \"email\"]}, \"rows\": {\"Person\": [[1, \"john@example.com\"], [2, \"bob@example.com\"], [3, \"john@example.com\"]]}}",
            "metaData": "{\n  \"mysql\": [\n    \"Create table If Not Exists Person (Id int, Email varchar(255))\"\n  ],\n  \"mssql\": [\n    \"Create table Person (Id int, Email varchar(255))\"\n  ],\n  \"oraclesql\": [\n    \"Create table Person (Id int, Email varchar(255))\"\n  ],\n  \"database\": true,\n  \"manual\": true\n}",
            "judgerAvailable": true,
            "judgeType": "large",
            "mysqlSchemas": [
                "Create table If Not Exists Person (Id int, Email varchar(255))",
                "Truncate table Person",
                "insert into Person (id, email) values ('1', 'john@example.com')",
                "insert into Person (id, email) values ('2', 'bob@example.com')",
                "insert into Person (id, email) values ('3', 'john@example.com')"
            ],
            "enableRunCode": true,
            "enableTestMode": false,
            "enableDebugger": false,
            "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>\"]}",
            "libraryUrl": null,
            "adminUrl": null,
            "challengeQuestion": null,
            "__typename": "QuestionNode"
        }
    }
}