What is a distributed database in Oracle?

In Oracle databases, a distributed database refers to a system where multiple database instances at different physical locations can communicate and collaborate with each other through network connections. This allows users to access and manipulate data from various geographic locations, while also improving data availability, reliability, and performance.

Distributed databases in Oracle databases are typically implemented through database links and distributed transaction management to distribute and manage data. Users can query and operate data between different database instances using database links, while ensuring consistency and reliability of transactions across database instances through distributed transaction management. Oracle databases also provide advanced features such as transparent data access and transparent data distribution to simplify management and operation of distributed databases for users.