National 5 Design Relationships and entity relationship diagrams Designing queries and establishing a data dictionary are important. Decisions should be informed by the Data Protection Act.

In building a logical data model, some entities are considered strong, other entities are considered weak. Strong entities are the most foundational elements within a nascent Entity-Relationship ...

The grammars used to generate entity-relationship diagrams and object-oriented conceptual models, for example, provide separate constructs for representing entities and attributes. The grammars used ...

Relationships and entity relationship diagrams A table in a database holds the attributes for one entity only. Data can then be added in the form of records.