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Oracle Database (marketed since 2025 as Oracle AI Database, and also referred to as Oracle DBMS or simply Oracle) is a proprietary relational database management system (RDBMS) developed and marketed by Oracle Corporation. First released in 1979, it was among the earliest commercially available databases to use SQL, and as of 2026 it is ranked as the most popular database management system in the DB-Engines ranking.
It is commonly used for online transaction processing (OLTP), data warehousing (DW), and mixed database workloads. As a converged database, it supports multiple data models within a single engine, including relational, JSON document, XML, spatial, graph, text, and AI vector data, all queryable through SQL.
Oracle Database runs on-premises, on Oracle engineered systems such as Oracle Exadata, on Oracle Cloud Infrastructure, and as a managed Autonomous Database service. It is also offered inside Microsoft Azure, Google Cloud, and Amazon Web Services data centers through Oracle's multicloud offerings. The current long-term release is Oracle AI Database 26ai, which was introduced in October 2025.