Advanced SQL Queries

Introduction Window functions in PostgreSQL allow you to perform calculations across a set of table rows related to the current...

Introduction Common Table Expressions (CTEs) in PostgreSQL provide a way to write complex queries in a more readable and maintainable...

Introduction Subqueries in PostgreSQL are queries nested inside another query. They allow you to retrieve intermediate results that can be...

Introduction Aggregate functions in PostgreSQL are powerful tools that allow you to perform calculations on a set of rows and...