Question

Which of the following is not characteristic of a relational database model?

• A. Tables
• B. treelike structure
• C. complex logical relationship
• D. records

Answer 1

Answer: (B)

treelike structure

Treelike structure is not characteristic of a relational database model.

A hierarchical database model is a data model in which the data are organized into a tree-like structure. The data are stored as records which are connected to one another through links. A record is a collection of fields, with each field containing only one value. The type of a record defines which fields the record contains.

The relational model for database management is an approach to managing data using a structure and language consistent with first-order predicate logic, where all data is represented in terms of tuples, grouped into relations.