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Learn how to create and query relational databases using SQL in just two hours.
Learn how to explore what's available in a database: the tables, relationships between them, and data stored in them.
Join two or three tables together into one, combine tables using set theory, and work with subqueries in PostgreSQL.
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PostgreSQL Basics Cheat Sheet
With this PostgreSQL cheat sheet, you'll have a handy reference guide to basic querying tables, filtering data, and aggregating data