RDBMS Basics Practice Test: Database Design and the ER Model — Flashcards

Quiz questions on entity relationship model and diagrams, relational schema and ER features.

Database design is the process of creating a logical and conceptual representation of the data that needs to be stored in a database. This ensures that the database is structured and organized to efficiently store and retrieve data, and to support the specific needs of the application or business. 

The database design process includes these steps: Understand business needs, Define entities, aka tables, Define properties, aka fields , Define relationships, Define table structures, data types, and constraints, Identify storage structures and access methods, Design security features, Choose specific structures and access paths for database files 

The physical design phase adjusts the physical attributes of the model based on the logical model in order to optimize the database performance and improve the efficiency of service operation and application efficiency. 

Here are some other database design concepts:
Conceptual design: The process that designs a conceptual data model that describes the main data entities, attributes, relationships, and constraints of a given problem domain
Data modeling: The process of creating a simplified visual diagram of a software system and the data elements it contains, using text and symbols to represent the data and how it flows
Normalization: The process of organizing data in a database, including creating tables and establishing relationships between those tables according to rules designed to protect the data and to make the database more flexible 

The Entity-Relationship (ER) model is a high-level data model that describes the relationship and data elements of a system. It's commonly used to develop a database's initial design. The ER model provides a graphical representation of the database's design and is made up of three components: entities, relationships, and attributes. 

Here are some basic concepts of the ER model:
Entities: A real-life concept, such as a location, person, or idea
Attributes: A collection of basic concepts that can be easily implemented in a database system
Relationships: The relationships that can exist between entities 

Related Test: DBMS Basics Practice Test: Database Systems Design and Implementation