DBMS Lecture 3: Data Models

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naiabhay89

19 Jan 2023

School

SAGE University - SU

Department

Engineering

Course

DBMS

Professor

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Document Summary

Data model gives us an idea that how the final system will look like after its complete implementation. It defines the data elements and the relationships between the data elements. Data models are used to show how data is stored, connected, accessed and updated in the database management system. Here, we use a set of symbols and text to represent the information so that members of the organization can communicate and understand it. Though there are many data models being used nowadays but the relational model is the most widely used model. This model organizes the data in the hierarchical tree structure. The hierarchy starts from the root which has root data and then it expands in the form of a tree adding child node to the parent node. This model easily represents some of the real-world relationships like food recipes, sitemap of a website etc.

Related Questions

How do Patrick Califia's “The Hustler” and Kushner’s “Angels in America” explore/represent the relationship between sexuality and crime, law, legislative power, investigation, punishment, and/or justice?

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Overview:

In this assignment you will review the hierarchy of an organism and the systems of the body. You will choose one system in the body and complete a chart listing the different parts for each level of organization within this system. After completing the chart, you will answer some discussion questions about your chosen system.

Background Information:

The hierarchy of an organism describes the levels of organization within an organism. These levels of organization are defined by the size and complexity of their parts from smallest to largest. The smallest level of organization of living organisms is a cell. A cell is the most basic unit of structure and function. Cells combine to create tissues. There are 4 types of tissues that make up all of the body:

Epithelial tissue forms the interior and exterior surfaces of the body. It creates surfaces for protection, absorption, and excretion.
Muscular tissue makes up the organs that have voluntary and involuntary functions and forms the organs responsible for movement.
Connective tissue forms binding, supporting, and transporting structures and usually contains collagen for strength.
Nervous tissue is made of neurons and glial cells that transport nerve impulses across the body.

Assignment:

On your own sheet of paper, draw and fill out the chart below and then answer the discussion questions.

SYSTEM NAME: