ORACLE:

Oracle is a product from Oracle corporation that provides a relational database management system. RDBMS supports any kind of data model.

It is a multi-model relational database management system, mainly designed for enterprise grid computing and data warehousing.

Oracle Editions:

Its database currently comes in five different editions based on the available features.

• Standard Edition One: It is suitable for single-server or highly branched business applications with limited features.
• Standard Edition: It delivers all facilities provided in Standard Edition One. In addition, it provides larger machine support and Oracle Real Application clustering service.
• Enterprise Edition: This edition is packed with features like security, performance, scalability, and availability, required for highly-critical applications in which online transaction processing is involved.
• Express Edition: It is an entry-level edition that is free to download, install, manage, develop and deploy.
• Personal Edition: It comes with the same Enterprise edition features except Oracle Real Application Clustering

MySQL:

MySQL is the world’s most popular open source database. According to DB-Engines, MySQL ranks as the second-most-popular database, behind Oracle Database. MySQL powers many of the most accessed applications, including Facebook, Twitter, Netflix, Uber, Airbnb, Shopify, and Booking.com.

Since MySQL is open source, it includes numerous features developed in close cooperation with users over more than 25 years. So it’s very likely that your favorite application or programming language is supported by MySQL Database.

MySQL is fast, reliable, scalable, and easy to use. It was originally developed to handle large databases quickly and has been used in highly demanding production environments for many years.

Although MySQL is under constant development, it offers a rich and useful set of functions. MySQL’s connectivity, speed, and security make it highly suited for accessing databases on the internet.

PostgreSQL:

PostgreSQL is an advanced, enterprise class open source relational database that supports both SQL (relational) and JSON (non-relational) querying. It is a highly stable database management system, backed by more than 20 years of community development which has contributed to its high levels of resilience, integrity, and correctness. PostgreSQL is used as the primary data store or data warehouse for many web, mobile, geospatial, and analytics applications. The latest major version is PostgreSQL 14.

PostgreSQL has a rich history for support of advanced data types, and supports a level of performance optimization that is common across its commercial database counterparts, like Oracle and SQL Server.

Differences:

Now that we have gone through some basics of all three most popular databases used today we will now put some spotlight on some of the most popular differences between them.

The figure below shows the differences among all three of them: