Data · Available on Amazon
SQL on Real Data by Kai London
Learn SQL by querying realistic datasets, from simple selects to joins, aggregation and window functions.
What the book covers
Querying basics
Selecting, filtering and sorting.
Joins and aggregation
Combining tables and summarising results.
Window functions
Ranking, running totals and comparisons.
Real-world habits
Readable, testable queries.
DataKai London
Who it is for
Analysts and developers learning SQL.
About the author
Professor Kai London — CISSP, CISM.
An internationally recognised cybersecurity executive, board advisor and Founder & CEO of Quantum AI Systems Security LLC, writing at the convergence of AI, governance and operational resilience. Honorary Professor and Researcher at UCL.