How To Draw ER Diagram
Are you wondering how online websites and mobile apps, store, retrieve and show different data types and the volume of data. This is because of the creation of Database which is an organized collection of information where data are stored, managed, updated, and retrieved.Databases have so many elements and understanding how they interact with each other is complex. This is where ER Diagrams are used.
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.
It has 3 Key components
1. Entity
2. Attribute
3. Relationship
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