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Introduction to Database - Coggle Diagram
Introduction to Database
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The Database Approach
Data Models
Data models is graphical systems used to capture the nature and relationships among data. A typical data model is made up of entities, attributes, and relationships and the most common data modeling representation is the entity relationship model
Entities
Entity is a person, a place, an object, an event, or a concept in the user environment about which the organization wishes to maintain data
Attribute
The data you are interested in capturing about the entity (e.g., Customer Name)
Instance
Data are recorded for many customers. Each customer’s information is referred to as an instance of CUSTOMER
Relationship
A well-structured database establishes the relationships between entities that exist in organizational data so that desired information can be retrieved.
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Relational Database
Relational database is a database that represents data as a collection of tables in which all data relationships are represented by common values in related tables.
Database Management System (DBMS)
A software system that is used to create, maintain, and provide controlled access to user databases.It enables end users and application programmers to share data, and it enables data to be shared among multiple applications
Systematic method of creating, updating, storing, and retrieving the data
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