Grokking SQL for Tech Interviews
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14. Find Interview Candidates
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Problem

Table: Contests

+--------------+------+
| Column Name  | Type |
+--------------+------+
| contest_id   | int  |
| gold_medal   | int  |
| silver_medal | int  |
| bronze_medal | int  |
+--------------+------+
contest_id is the column with unique values for this table.
This table contains the Design Guru contest ID and the user IDs of the gold, silver, and bronze medalists.
It is guaranteed that any consecutive contests have consecutive IDs and that no ID is skipped.

Table: Users

+-------------+---------+
| Column Name | Type    |
+-------------+---------+

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Table of Contents

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