#### Self-managed 1. **MySQL (preferred among data scientists):** An open-source relational database management system known for its speed and reliability, MySQL is a popular choice for web applications. When installed on your own servers, you have full control over its configuration and management, allowing you to tailor it to your specific needs. 2. **PostgreSQL (most popular among everyone else):** As an advanced open-source relational database system, PostgreSQL stands out with its emphasis on extensibility and SQL compliance. When you manage PostgreSQL on your own infrastructure, you can leverage its wide range of features and custom functions to optimize your data management. 3. **MongoDB (not officially supported by Django):** Distinguished by its flexible, document-oriented data model, MongoDB is a source-available database program that supports various data types and dynamic schemas. Managing MongoDB on your own infrastructure allows you to fully exploit its scalability and querying capabilities, making it ideal for handling large amounts of diverse data.