A free open-source RDBMS that best meets the needs of Casey is the PostgreSQL.
<h3>What is an open source database?</h3>
An Open source data base is available to be freely copied and modified to meet specific needs. The following are the types of open-source RDBMS; MariaDB, Db2 Express-C, SQLite, CUBRID, Firebird, Oracle Database XE etc. The database makes the management of the company information to be seamless. This is why many companies, not just the tech companies are heading towards the development of excellent databases.
A free open-source RDBMS that best meets the needs of Casey is the PostgreSQL. This is the kind of database that would meet the specifications of the company.
Learn more about open source database:brainly.com/question/20598385
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