The purpose of this repository is to serve as a practical study guide for SQL learners and a cheat sheet for future use. The Database Management System of choice was PostgreSQL due to its open-source ...

product_id is the primary key of this table. Write an SQL query that reports all product names of the products in the Sales table along with their selling year and price.

SQL is a language used to get data from databases. It helps websites, apps, and reports work. Even social media and online shopping use SQL behind the scenes. The basic rules are easy to learn. But a ...

Follow this step-by-step guide to install PostgreSQL, load data, connect to a database, and execute SQL queries including table joins PostgreSQL is an open-source, object-relational (also called ...