IM UNIT 5- Understanding Data model and Schema

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pt 1

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4 Terms

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Data Model

High-level description of how data is structured and related (e.g., relational model). Hides low-level storage details.

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Schema

Actual description of data using a data model (e.g., relation name, fields/attributes, types).

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Types of Data Models:

Semantic Data Model

More abstract; focuses on the meaning of data (e.g., “An Artist RECORDS an Album”).

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Types of Data Models:

Relational Model

Organizes data into tables (relations) with attributes (columns) and tuples (rows).