Question

What are the three types of models we can create when generating a schema?

• A. \( \text{Physical, logical, or rational} \)
• B. \( \text{Logical, rational, or metadata} \)
• C. \( \text{Physical, logical, or metadata} \)
• D. \( \text{Physical, rational, or metadata} \)

Hint:

Think of it as: how it's stored (physical), what it means (logical), and information about it (metadata).

Answer 1

The Correct Option is C

When generating a schema, we can create three main types of models: \begin{itemize} \item Physical Model: Describes the actual storage of data in the database, including tables, data types, and constraints. \item Logical Model: Represents the conceptual structure of the data and the relationships between different entities, independent of any specific physical implementation. \item Metadata Model: Describes the data about the data, providing information about the schema itself, such as definitions, characteristics, and usage. \end{itemize}