Oracle is one of the world's most valuable software companies. Which database model did its first commercial product use?

Oracle's first commercial product used the relational database model.

Oracle was founded as Software Development Laboratories in 1977 by Larry Ellison, Bob Miner, and Ed Oates. The company's early work was influenced by Edgar F. Codd's relational database concepts, which organize information into tables connected through relationships.

In 1979, the company released Oracle V2, widely described as the first commercially available SQL relational database system. There was no Oracle V1 because the founders wanted to avoid suggesting that the product was unfinished or untested.

Relational databases differ from hierarchical systems because they represent data in tables rather than requiring a strict tree structure. SQL became central to Oracle's products and also became a widely used language for querying relational databases across the industry.