What characteristic defines an object-oriented database?

An object-oriented database is defined by its ability to store both data and relationships in a single structure, which allows for a more integrated and flexible way of handling complex data types. In an object-oriented database, data is encapsulated as objects that include not just the data fields but also the methods to manipulate that data. This structure is beneficial for applications that require complex data representations, such as graphics or multimedia content, as it provides a more intuitive way to handle real-world entities and their relationships.

The characteristic of combining data and relationships into a single structure enables developers to mirror real-world scenarios closely and improves the efficiency of data access and manipulation. This stands in contrast to traditional databases, which often separate data and relationships, making it challenging to manage complex interactions. Thus, the integration of data and relationships is central to the philosophy and functionality of object-oriented databases.