Databases and SQL: Your First 8 Queries

You'll walk away with

Eight working SQL queries run against a real table, answering real questions about the data

Before thisTC-01 What a Computer Actually Does: CPU, RAM, Disk, OS

If it looks different

⚠️ Version note. SQL is remarkably stable — these eight queries work across SQLite, PostgreSQL, MySQL and most databases with tiny differences. Tool interfaces vary. Last checked: 25 July 2026.

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01Why SQL, when you have spreadsheets?
02Get a table to query
03The 8 queries
04Answer a real question end to end
05Common mistakes
35′Exercise, with a verifiable output
07Cheatsheet
✓Check yourself — the quiz
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Eight working SQL queries run against a real table, answering real questions about the data

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