SQL & Databases — From Queries to Database Design with Karan Raj

SQL & Databases — From Queries to Database Design provides a practical introduction to the databases that power modern applications.

Starting with fundamental concepts such as databases, tables, relationships, primary keys, and foreign keys, the book progressively teaches SQL through realistic examples involving customers, products, orders, employees, and other real-world data.

You will learn filtering, sorting, aggregation, joins, subqueries, CTEs, window functions, database design, normalization, indexes, transactions, ACID concepts, and query optimization. The book also demonstrates how applications interact with databases and provides extensive exercises and interview questions to reinforce your knowledge.