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A database is generally referred to a collection of files or records. Record is a collection of fields which is specified as memory used to store a unit of data item. A database system is defined as the collection of stored operational data which is used by application systems.

The key components of database system

1. Data
2. Software
3. Hardware
4. User

Database Architectures

1. External Level – User’s View
2. Conceptual Level- Programmer’s View
3. Internal Level – Storage View

Relational Model

Relational model is defined as the database of collection of relations. These relations are displayed as tables with rows and columns.

Relational Database Design

The goal of database design is to generate a set of relation schemes that allow us to store information without redundancy, yet allow us to retrieve information easily. One approach is to design schemes that are in an appreciate normal forms.

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Important Topics

>> Design ER Diagram
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