Think in SQL: Learn SQL from Zero to Hero with Datasets and an Enterprise-Level Practice Website
English | October 14, 2026 | ASIN: B0HN2J2MLD | 850 pages | Epub | 12.69 MB
You need no SQL to start this book, and it gets you ready for the day real work arrives. A join doubles the revenue. GROUP BY throws an error you can't decode. Window functions look like incantations, a colleague drops a Parquet file and a JSON feed in a folder, and an AI assistant hands you a 40-line query you can't vouch for.Think in SQL takes you from your first SELECT to the SQL data engineers write every day, and you practise all of it on the book's practice website: an online SQL playground built for this book and loaded with realistic enterprise mock data. There is nothing to install. Open a browser, create an account with your book code, and run every exercise and project, and nearly every listing, against an e-commerce storefront's customers, product catalogue, orders, payment-gateway records and cashback ledger, JSON metadata included. The website address and your book code are printed inside.Every query was run on PostgreSQL 18, the engine the website runs, and the output under each listing is the output it returned. Where MySQL, SQL Server, Snowflake, BigQuery or Spark SQL spell something differently, the book shows how. Every exercise ends with a check value, a row count and, usually, a total or value to compare, so you know you're right without looking at the answer.By the end you will be able to:turn a colleague's request into a query, clause by clause, with a method you can reusejoin and group without duplicated rows, and catch the fan-out bug before it reaches a reportrank, compare and total with window functions, frames includedclean text with LIKE and regular expressions, and get dates and time zones rightturn CSV and JSON into typed tables, query nested JSON and arrays, and choose a file format you can defenddesign tables with keys and constraints, upsert with ON CONFLICT and MERGE, and keep history with SCD Type 2use transactions, isolation levels, functions, procedures, triggers and scheduled jobsread a query plan, add the index that helps, and write queries an attacker can't rewritereview SQL you didn't write, including an AI assistant's Inside: 150+ exercises in three levels, five Boss Fights, 20 interview patterns plus a Concept Round, a Hero Project that builds an analytics warehouse end to end, a cheat book with an error decoder, and a dialect passport for MySQL, SQL Server, Snowflake, BigQuery and Spark SQL.