Oracle vs MySQL: Key Differences

Oracle and MySQL are two distinct types of relational database management systems with several notable differences between them.

1. Company background: Oracle is a commercial database management system developed and maintained by the American company Oracle Corporation, while MySQL is a system developed by the Swedish company MySQL AB and later acquired by Sun Microsystems, now maintained by Oracle Corporation.
2. Licensing Method: Oracle is a commercial database that requires purchasing a license to use, while MySQL is an open-source database that can be used for free.
3. Oracle is a robust and high-performance database management system suitable for large enterprise-level applications, supporting complex data processing and high concurrency. In contrast, MySQL, while also supporting most common database functions, is relatively weaker in handling large-scale data and high concurrency access.
4. Supported storage engines: Oracle supports various storage engines such as InnoDB, MyISAM, MEMORY, etc. You can choose different engines for optimization based on your needs. MySQL also supports multiple storage engines, with InnoDB being the default engine.
5. Oracle and MySQL have some differences in data types and syntax, such as in date-time types, string handling, and index types.

In general, Oracle is mainly suitable for large enterprise applications with more powerful features and performance, but it requires a certain fee; while MySQL is suitable for medium and small applications, being a lightweight database management system that is free and easy to deploy and use. The choice of which database to use depends on specific needs and budget.