Lecture 16.1: Attributes in ER Diagrams – Types, Keys & Design Tips Explained
In Lecture 16, dive deep into attributes in ER diagrams and learn how they define the details of every entity in your database design. This session clearly explains different types of attributes such as simple, composite, single‑valued, multi‑valued, derived, and key attributes, with intuitive examples like Student, Course, and Order so you can immediately connect theory to real‑world models. You will see how to choose good attributes from a problem statement, how to represent them correctly using ovals in ER diagrams, and how key attributes help in uniquely identifying entities before they are converted into primary keys in relational tables. The lecture also covers common mistakes students make, like mixing up multi‑valued and composite attributes or placing attributes on the wrong entity or relationship set, and then shows better design alternatives. By the end of this video, you will be able to read and draw ER diagrams with properly classified attributes, which will make mapping to relational schema and normalization much easier .
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