How to Solve Delete Duplicate Emails Problem
Master the Delete Duplicate Emails LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Delete Duplicate Emails
Table: Person +-------------+---------+ | Column Name | Type | +-------------+---------+ | id | int | | email | varchar | +-------------+---------+ id is the primary key (column ...
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Understanding the Delete Duplicate Emails Problem
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Problem Statement
Table: Person +-------------+---------+ | Column Name | Type | +-------------+---------+ | id | int | | email | varchar | +-------------+---------+ id is the primary key (column with unique values) for this table. Each row of this table contains an email. The emails will not contain uppercase letters. Write a solution to delete all duplicate emails, keeping only one unique email with the smallest id. For SQL users, please note that you are supposed to write a DELETE statement and not a SELECT one. For Pandas users, please note that you are supposed to modify Person in place. After running your script, the answer shown is the Person table. The driver will first compile and run your piece of code and then show the Person table. The final order of the Person table does not matter. The result format is in the following example.
Delete Duplicate Emails
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Examples
Example inputExample outputjohn@example.com is repeated two times. We keep the row with the smallest Id = 1.
Constraints
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