Oracle Database 21c is the result of four decades of development. Oracle Database was the first commercial SQL-based relational database (1979), implemented based on a published IBM specification.

DATEDIFF is a common function in the SQL Server to find the number of days between two dates. Oracle offers its own solution, although does not have the DATEDIFF function.

Oracle’s change in strategy to release a developer-first version of its new database is linked to the company’s plans to defend its market dominance and look at innovative ways to acquire new ...