Complex Data Types ■Motivation: Permit non-atomic domains (atomic indivisible) Example of non-atomic domain:set of integers,or set of tuples Allows more intuitive modeling for applications with complex data Intuitive definition: Allow relations whenever we allow atomic(scalar)values -relations within relations Retains mathematical foundation of relational model Violates first normal form. Database System Concepts-7th Edition 29.4 ©Silberscha乜，Korth and SudarshanDatabase System Concepts - 7 29.4 ©Silberschatz, Korth and Sudarshan th Edition Complex Data Types ▪ Motivation: • Permit non-atomic domains (atomic  indivisible) • Example of non-atomic domain: set of integers, or set of tuples • Allows more intuitive modeling for applications with complex data ▪ Intuitive definition: • Allow relations whenever we allow atomic (scalar) values — relations within relations • Retains mathematical foundation of relational model • Violates first normal form