A database model that describes the attributes of entities and the relationships among them. An entity is a file (table). Today, ER models are often created graphically, and software converts the ...

Introduce the concepts about relational models. Train students on how to convert a conceptual entity relationship model to a relational model. Introduce students with the reasons and process of ...

A description of the organization of a database. It is often created as an entity relationship diagram. Today's modeling tools allow the attributes and tables (fields and records) to be graphically ...

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 ...

At its heart, data modeling is about understanding how data flows through a system. Just as a map can help us understand a city’s layout, data modeling can help us understand the complexities of a ...

In a recent article I showed that using Entity Framework navigation properties makes your code considerably simpler than using the more "SQL-like" Joins (though you certainly can do Joins in LINQ). I ...

If you've ever wondered what killed 4GLs the answer is a mistake - one that permeates almost everything in IT from about 1969 through to today. Codd's relational model wasn't designed as a solution to ...