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 ...

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 ...

trans_id is the primary key for this table. Each row of this table contains all changes made to all accounts. amount is positive if the user received money and negative if they transferred money. All ...

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 ...

SQL is the most common back end data storage and data processing solution used by Facebook, Twitter, Instagram, Spotify etc. Structured Query Language or SQL is the standard language for relational ...