Databases
Database Analogies
Collected by Xiaoying Tu — Lecture Notes
Conceptual modeling
Anything else
Highlights the fact that relational models consist of only one type of building blocks: the relations. This is in contrast to conceptual models which typically consist of different types of building blocks (entities, relationships, multiplicities, inheritance, etc.)
| Symbol | Concept |
|---|---|
| Lego bricks | relations |
Relational models consist of relations only
There is only one type of building blocks in Lego buildings: the lego bricks. Similarly, there is only one type of building blocks in relational models: the relations.
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A notional machine is a pedagogic device to assist the understanding of some aspect of programs or programming. To something along the lines of A notional machine is a pedagogical tool designed to support the understanding of programs, programming, and other aspects of computing such as databases.
