Table: Person
\n+-------------+---------+\n| Column Name | Type |\n+-------------+---------+\n| id | int |\n| email | varchar |\n+-------------+---------+\nid is the primary key (column with unique values) for this table.\nEach row of this table contains an email. The emails will not contain uppercase letters.\n\n\n
\n\n
Write a solution to report all the duplicate emails. Note that it's guaranteed that the email field is not NULL.
\n\nReturn the result table in any order.
\n\nThe result format is in the following example.
\n\n\n
Example 1:
\n\n\nInput: \nPerson table:\n+----+---------+\n| id | email |\n+----+---------+\n| 1 | a@b.com |\n| 2 | c@d.com |\n| 3 | a@b.com |\n+----+---------+\nOutput: \n+---------+\n| Email |\n+---------+\n| a@b.com |\n+---------+\nExplanation: a@b.com is repeated two times.\n\n", "translatedTitle": "查找重复的电子邮箱", "translatedContent": "\n\n
表: Person
\n+-------------+---------+\n| Column Name | Type |\n+-------------+---------+\n| id | int |\n| email | varchar |\n+-------------+---------+\nid 是该表的主键（具有唯一值的列）。\n此表的每一行都包含一封电子邮件。电子邮件不包含大写字母。\n\n\n
\n\n
编写解决方案来报告所有重复的电子邮件。 请注意，可以保证电子邮件字段不为 NULL。
\n\n以 任意顺序 返回结果表。
\n\n结果格式如下例。
\n\n\n\n
示例 1:
\n\n\n输入: \nPerson 表:\n+----+---------+\n| id | email |\n+----+---------+\n| 1 | a@b.com |\n| 2 | c@d.com |\n| 3 | a@b.com |\n+----+---------+\n输出: \n+---------+\n| Email |\n+---------+\n| a@b.com |\n+---------+\n解释: a@b.com 出现了两次。\n", "isPaidOnly": false, "difficulty": "Easy", "likes": 481, "dislikes": 0, "isLiked": null, "similarQuestions": "[]", "contributors": [], "langToValidPlayground": "{\"cpp\": false, \"java\": false, \"python\": false, \"python3\": false, \"mysql\": false, \"mssql\": false, \"oraclesql\": false, \"c\": false, \"csharp\": false, \"javascript\": false, \"typescript\": false, \"bash\": false, \"php\": false, \"swift\": false, \"kotlin\": false, \"dart\": false, \"golang\": false, \"ruby\": false, \"scala\": false, \"html\": false, \"pythonml\": false, \"rust\": false, \"racket\": false, \"erlang\": false, \"elixir\": false, \"pythondata\": false, \"react\": false, \"vanillajs\": false, \"postgresql\": false}", "topicTags": [ { "name": "Database", "slug": "database", "translatedName": "数据库", "__typename": "TopicTagNode" } ], "companyTagStats": null, "codeSnippets": [ { "lang": "MySQL", "langSlug": "mysql", "code": "# Write your MySQL query statement below", "__typename": "CodeSnippetNode" }, { "lang": "MS SQL Server", "langSlug": "mssql", "code": "/* Write your T-SQL query statement below */", "__typename": "CodeSnippetNode" }, { "lang": "Oracle", "langSlug": "oraclesql", "code": "/* Write your PL/SQL query statement below */", "__typename": "CodeSnippetNode" }, { "lang": "Pandas", "langSlug": "pythondata", "code": "import pandas as pd\n\ndef duplicate_emails(person: pd.DataFrame) -> pd.DataFrame:\n ", "__typename": "CodeSnippetNode" }, { "lang": "PostgreSQL", "langSlug": "postgresql", "code": "-- Write your PostgreSQL query statement below", "__typename": "CodeSnippetNode" } ], "stats": "{\"totalAccepted\": \"324.8K\", \"totalSubmission\": \"412.9K\", \"totalAcceptedRaw\": 324808, \"totalSubmissionRaw\": 412865, \"acRate\": \"78.7%\"}", "hints": [], "solution": { "id": "103", "canSeeDetail": true, "__typename": "ArticleNode" }, "status": null, "sampleTestCase": "{\"headers\": {\"Person\": [\"id\", \"email\"]}, \"rows\": {\"Person\": [[1, \"a@b.com\"], [2, \"c@d.com\"], [3, \"a@b.com\"]]}}", "metaData": "{\"mysql\":[\"Create table If Not Exists Person (id int, email varchar(255))\"],\"mssql\":[\"Create table Person (id int, email varchar(255))\"],\"oraclesql\":[\"Create table Person (id int, email varchar(255))\"],\"database\":true,\"name\":\"duplicate_emails\",\"pythondata\":[\"Person = pd.DataFrame([], columns=['id', 'email']).astype({'id':'Int64', 'email':'object'})\"],\"postgresql\":[\"Create table If Not Exists Person (id int, email varchar(255))\"],\"database_schema\":{\"Person\":{\"id\":\"INT\",\"email\":\"VARCHAR(255)\"}}}", "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', 'a@b.com')", "insert into Person (id, email) values ('2', 'c@d.com')", "insert into Person (id, email) values ('3', 'a@b.com')" ], "enableRunCode": true, "envInfo": "{\"mysql\":[\"MySQL\",\"
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