This repository is about questions of various difficulty levels related to different aspects of SQL.
SQL (Structured Query Language) is a powerful and standardized programming language used for managing and manipulating relational databases. It is essential for storing, retrieving, updating, and managing data in various applications, making it a critical tool for businesses and organizations to efficiently handle their data and make informed decisions.
Because of the importance of SQL, it is very important to master this field both theoretically and practically. This file contains the answers I gave to the questions taken from the following sources to achieve this goal.
- PostgreSQL Exercises (https://pgexercises.com/)