January 2019
Beginner
556 pages
14h 19m
English
Content preview from Learning PostgreSQL 11 - Third Edition
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The entity-relation model
The entity-relation (ER) model falls into the conceptual data model category. It captures and represents the data model for both business users and developers. The ER model can be transformed into the relational model by following certain techniques.
Conceptual modeling is a part of the software development life cycle (SDLC). It is normally done after the functional and data requirement-gathering stage. At this point, the developer is able to make the first draft of the ER diagram as well as describe functional requirements using data flow diagrams, sequence diagrams, user stories, and many other techniques.
During the design phase, the database developer should give great attention to the design, run a benchmark ...
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