PostgreSQL is an open-source, object-relational database system. It is the most advanced open-source database system available, and is used for a variety of applications including data warehousing, e-commerce, web content management, and more. PostgreSQL is often referred to as the world’s most advanced open-source database.
Example:
Let’s say you have a database of customers. You can create a table in PostgreSQL to store customer information such as name, address, email, and phone number. You can also create other tables to store order information, such as items purchased, order date, and shipping address. With PostgreSQL, you can easily query the database to get customer information or order information. You can also use PostgreSQL to perform complex calculations and data analysis on your customer data.