The latest version is Oracle Database 21c, released in December 2020.
This version is almost entirely cloud-based, pointing to a sector innovation towards that end-goal,
where physical servers for every company will no longer be necessary.
You can check the version of Oracle Database server by running the command
SELECT BANNER FROM V$VERSION;
This will display the version of Oracle Database server you are using.
About Oracle DB
Oracle Database database management system produced and marketed by Oracle Corporation.
Oracle DB is a widely used server for the very popular and mainstream SQL language.
Oracle DB is owned and maintained by the company mentioned in the name of the technology, with its first release in
the database software and server platform has since competed with the likes of Microsoft SQL Server, MySQL, and
Oracle DB is an object-relational database management system (ORDBMS). Essentially, the OracleDB technology allows an
corporation, or any other data-generating user to upload their information to a server, to then access it via SQL
and retrieve whatever is required to facilitate data analysis tasks.