UML Diagrams - A Beginner's Guide

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What an ER Diagram is and why it is needed?
ER stands for Entity-Relationship (ER) Diagram, It is also known as ERD. It is a visual representation of how tables (also known as entities) in a system are related to each other.One advantage of using ER Diagrams is that, it makes it easier for business folks to understand the data because it is presented in a graphical manner.In business analysis, ERD is a vital part of designing software systems. ERDs are mainly used by analysts in designing database, especially when handling complex data.

Activity diagram is one type of UML diagram which will help to document the list of activities involved in a use case or a scenario and their sequence.
In this video, we will cover how to draw an activity diagram using just 6 Key components listed below with an help of a simple case study:
- Swimlanes
- Start
- Activity
- Decision Box
- End
- Horizontal Bars


Learn how to draw a User Case Diagram using the 4 Key components. We will go over the components one by one.

0:00 Introduction
1:36 WHAT IS AN ER DIAGRAM?
2:42 COMPONENTS OF ER DIAGRAM
4:06 ENTITIES
4:53 ATTRIBUTES
6:44 RELATIONSHIP
8:30 Conclusion
15:46 COMPONENTS OF USE CASE DIAGRAM
18:32 CASE STUDY