SQL Fundamentals

Summary

SELECT, WHERE, ORDER BY and basic filtering — the core statement pattern for pulling exactly the data you need, and the most common way real datasets reach a data scientist in the first place.

How to Learn This

1Write 10 basic SELECT queries against a free sample database.
2Practice combining multiple WHERE conditions with AND/OR.
3Learn the clause order SQL requires (SELECT, FROM, WHERE, ORDER BY).

End-to-End EDA on a Real Dataset

Joins & Aggregations

More topics in SQL & Databases

Joins & Aggregations Window Functions Query Optimization NoSQL Basics (MongoDB Overview)Data Warehouses (BigQuery, Snowflake)

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