leetcode-problemset/leetcode/originData/find-users-with-valid-e-mails.json

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            "questionId": "1664",
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            "title": "Find Users With Valid E-Mails",
            "titleSlug": "find-users-with-valid-e-mails",
            "content": "<p>Table: <code>Users</code></p>\n\n<pre>\n+---------------+---------+\n| Column Name   | Type    |\n+---------------+---------+\n| user_id       | int     |\n| name          | varchar |\n| mail          | varchar |\n+---------------+---------+\nuser_id is the primary key (column with unique values) for this table.\nThis table contains information of the users signed up in a website. Some e-mails are invalid.\n</pre>\n\n<p>&nbsp;</p>\n\n<p>Write a solution to find the users who have <strong>valid emails</strong>.</p>\n\n<p>A valid e-mail has a prefix name and a domain where:</p>\n\n<ul>\n\t<li><strong>The prefix name</strong> is a string that may contain letters (upper or lower case), digits, underscore <code>&#39;_&#39;</code>, period <code>&#39;.&#39;</code>, and/or dash <code>&#39;-&#39;</code>. The prefix name <strong>must</strong> start with a letter.</li>\n\t<li><strong>The domain</strong> is <code>&#39;@leetcode.com&#39;</code>.</li>\n</ul>\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>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> \nUsers table:\n+---------+-----------+-------------------------+\n| user_id | name      | mail                    |\n+---------+-----------+-------------------------+\n| 1       | Winston   | winston@leetcode.com    |\n| 2       | Jonathan  | jonathanisgreat         |\n| 3       | Annabelle | bella-@leetcode.com     |\n| 4       | Sally     | sally.come@leetcode.com |\n| 5       | Marwan    | quarz#2020@leetcode.com |\n| 6       | David     | david69@gmail.com       |\n| 7       | Shapiro   | .shapo@leetcode.com     |\n+---------+-----------+-------------------------+\n<strong>Output:</strong> \n+---------+-----------+-------------------------+\n| user_id | name      | mail                    |\n+---------+-----------+-------------------------+\n| 1       | Winston   | winston@leetcode.com    |\n| 3       | Annabelle | bella-@leetcode.com     |\n| 4       | Sally     | sally.come@leetcode.com |\n+---------+-----------+-------------------------+\n<strong>Explanation:</strong> \nThe mail of user 2 does not have a domain.\nThe mail of user 5 has the # sign which is not allowed.\nThe mail of user 6 does not have the leetcode domain.\nThe mail of user 7 starts with a period.\n</pre>\n",
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                    "lang": "Oracle",
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                    "lang": "Pandas",
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                    "code": "import pandas as pd\n\ndef valid_emails(users: pd.DataFrame) -> pd.DataFrame:\n    ",
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                    "lang": "PostgreSQL",
                    "langSlug": "postgresql",
                    "code": "-- Write your PostgreSQL query statement below\n",
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            "stats": "{\"totalAccepted\": \"66.2K\", \"totalSubmission\": \"140.9K\", \"totalAcceptedRaw\": 66238, \"totalSubmissionRaw\": 140942, \"acRate\": \"47.0%\"}",
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            "sampleTestCase": "{\"headers\":{\"Users\":[\"user_id\",\"name\",\"mail\"]},\"rows\":{\"Users\":[[1,\"Winston\",\"winston@leetcode.com\"],[2,\"Jonathan\",\"jonathanisgreat\"],[3,\"Annabelle\",\"bella-@leetcode.com\"],[4,\"Sally\",\"sally.come@leetcode.com\"],[5,\"Marwan\",\"quarz#2020@leetcode.com\"],[6,\"David\",\"david69@gmail.com\"],[7,\"Shapiro\",\".shapo@leetcode.com\"]]}}",
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                "Create table If Not Exists Users (user_id int, name varchar(30), mail varchar(50))",
                "Truncate table Users",
                "insert into Users (user_id, name, mail) values ('1', 'Winston', 'winston@leetcode.com')",
                "insert into Users (user_id, name, mail) values ('2', 'Jonathan', 'jonathanisgreat')",
                "insert into Users (user_id, name, mail) values ('3', 'Annabelle', 'bella-@leetcode.com')",
                "insert into Users (user_id, name, mail) values ('4', 'Sally', 'sally.come@leetcode.com')",
                "insert into Users (user_id, name, mail) values ('5', 'Marwan', 'quarz#2020@leetcode.com')",
                "insert into Users (user_id, name, mail) values ('6', 'David', 'david69@gmail.com')",
                "insert into Users (user_id, name, mail) values ('7', 'Shapiro', '.shapo@leetcode.com')"
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