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Databases and Entity Relationship Diagrams | DAL4 RS A4.1 |

Firstly, let’s examine the concept of the word ‘database’ so that we can understand the various references to it. 

When people refer to a 'database' they mean one of three things: 

  1. A LOGICAL COLLECTION of tables (and other objects) that store data.

This is the definition of what a database really is. An example of this is LandRegistry. 

  1. A SOFTWARE application that manages databases, stores data, and handles queries, called DBMS which stands for Database Management System.

Some examples of DBMS are Oracle, MySQL, MS SQL Server. 

  1. A HARDWARE that has DBMS installed, called a database server.

An example of this is your computer. 

Next, let’s look at what are the main types of databases that are in use. 

Difficulty
Intermediate
Duration
14m
Students
15
Ratings
5/5
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Description

This first course gives an overview of the five main database types and the components and concepts related to Entity Relationship Diagrams.

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