YugabyteDB is a PostgreSQL-compatible, distributed SQL database that supports many features similar to Oracle, including string concatenation, ROWNUM and ROWID pseudocolumns, IF EXISTS for DDL operations, outer joins using (+), UPDATE and DELETE with another table, MERGE (UPSERT) statements, TRUNCATE operations, hierarchical queries, partition handling, block structure, and packages. YugabyteDB is designed to handle automatic geo-distribution, continuous availability, and open source licensing while maintaining SQL feature depth, performance, and ACID compliance. Most of the features highlighted in Roland's post are supported by YugabyteDB, with a few exceptions that will be addressed in future releases.