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

Correct option is B

A relational database model organizes data into tables (relations) that are linked by relationships. It does not use a tree-like structure, which is a characteristic of hierarchical database models. The relational model focuses on tabular data representation.
Important Key Points:
1. Tables: Relational databases store data in tables consisting of rows (records) and columns (fields).
2. Tree-like structure: This is specific to hierarchical databases, not relational ones.
3. Relational databases utilize primary keys and foreign keys to establish relationships between tables.
Knowledge Booster:
1. Hierarchical Database: Organizes data in a tree-like structure with parent-child relationships.
2. Complex Logical Relationships: Relational databases can model complex relationships using joins and constraints.
3. Records: Represent rows in a table, where each row corresponds to a single data item.