Stop 04 · SQL & Data Engineering BasicsTopics · 1/9
SQL Basics (SELECT, JOIN, GROUP BY)
Part of the AI Engineer Roadmap
In short
The query language for relational databases — most real-world training data lives in SQL databases, so you need to pull it out yourself.
How to learn this
- 1Practice SELECT, WHERE, JOIN, GROUP BY and ORDER BY on a sample database (e.g. SQLite).
- 2Write queries that answer specific analytical questions, not just syntax drills.
- 3Learn to read a query execution plan at a basic level.
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