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Co-authored-by: Seth <seth@elypia.org>

Co-authored-by: Seth <seth@elypia.org>
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### SQL
* [Intro to SQL: Querying and managing data](https://www.khanacademy.org/computing/computer-programming/sql) - Khan Academy
* [SQL at Codecademy](https://www.codecademy.com/courses/learn-sql)
* [SQLBolt](http://sqlbolt.com)