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The PostgreSQL Tutorial is provided by the official PostgreSQL documentation, which is maintained by the PostgreSQL Global Development Group. This group consists of volunteers and companies dedicated to the development and promotion of PostgreSQL, a powerful, open-source relational database management system. The official documentation is known for its comprehensiveness, accuracy, and up-to-date information.
This tutorial focuses on PostgreSQL, an advanced open-source relational database system. It covers the fundamental concepts of PostgreSQL, including installation, basic operations, SQL queries, data manipulation, and database management. The tutorial is designed to help users understand the core features and capabilities of PostgreSQL, enabling them to effectively use and manage PostgreSQL databases in various applications and environments.