Description: A nested table is a type of collection in Oracle Database that allows for the storage of an unordered set of elements. These tables are data structures that can contain multiple rows and columns and are primarily used to store complex data that does not fit into a traditional relational schema. Nested tables are particularly useful in situations where hierarchical or related information needs to be stored, such as lists of items or records containing sub-records. One of the most notable features of nested tables is their ability to be used as data types in other tables, allowing for greater flexibility in database design. Additionally, nested tables can be manipulated using SQL, making it easier to integrate them into queries and database operations. In summary, nested tables in Oracle Database provide a powerful and versatile way to manage complex data, enabling developers and database administrators to create richer structures tailored to the specific needs of their applications.
