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1: Welcome to Learn SQL
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2: Select Single Column
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3: Select Multiple Columns
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4: What Is SQL?
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5: Which Databases Use SQL?
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6: Comparing SQL Databases
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7: NoSQL vs. SQL
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SQL (Structured Query Language) is the language we use to talk to databases. PostgreSQL, MySQL, SQLite, and most other databases that store data in tables all speak it.
In this course, you'll learn SQL by working on the database for a make-believe PayPal-clone called CashPal! You'll write queries that interact with users, transactions, payouts, and more.
The code on 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 is actually named users, not people!
Fix the bug by changing "people" to "users" in the query, then submit your answer.