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Welcome to Learn SQL

Welcome to this comprehensive course on SQL: Structured Query Language! Whether you're interested in working with PostgreSQL, MySQL, SQLite, or any other SQL database, this course will teach you the language you need to master them.

Let's Build a Payment App

In this course, we'll work on the database for a make-believe PayPal-clone called CashPal! We'll write queries that interact with users, transactions, payouts, and so on.

Assignment

The code to the right is a simple query that returns ("selects") all the rows and columns from a "people" table – but there's a problem! The table we're trying to use is called users, not people!

Fix the bug by changing "people" to "users" in the query, then submit your answer.