Conceptual Database Design with ER Model

Conceptual Database Design with ER Model is one of the most important topic in Databases. Whenever a programmer wants to develop a database the ER Model is the basic thing he starts with.

ER Model Def. ER Model shows relations between the objects/entities in a database. Wikipedia definition of ER Model HERE. There are three basic things in an ER model

• Entity
• Attributes
• Relationships

Why to Use ER Model?

• Helps in defining terms related to entity relationship modeling.
• build logical tables
• ER Model Helps in making relational tables and they further help to make a whole database.
• Works as a blueprint for a database.

Symbols in ER Model

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