About tables

About tables

Question:
Please describe the basic components of a table in the relational model.

Answer:
A table has an intension and an extension. You can think of the intension of a table as the names of its columns, so the intension describes the thing the table is about.The extension of a table is the table’s rows, or instances, examples, or samples of the table’s intention? things that exist in the universe described by the domains of the table.

Domains are the conceptual pool of values from which attributes can be drawn, and are the glue that make comparisons possible in a database. Domains are what make operations make sense in attributes. We don’t ask for the temperature of Orange, or the product of Nuts times Bolts because the comparisons make no sense because the domains are different.

The main thing for you to carry from this is that domains describe the universe of discourse, and the organization of domains into tables allows us to collect instances of the entity described by the domains. Operations defined on the domains are what let us do compares, make products, divisions, unions, differences and additions of relational facts.

Share the Post:
XDR solutions

The Benefits of Using XDR Solutions

Cybercriminals constantly adapt their strategies, developing newer, more powerful, and intelligent ways to attack your network. Since security professionals must innovate as well, more conventional endpoint detection solutions have evolved

AI is revolutionizing fraud detection

How AI is Revolutionizing Fraud Detection

Artificial intelligence – commonly known as AI – means a form of technology with multiple uses. As a result, it has become extremely valuable to a number of businesses across

AI innovation

Companies Leading AI Innovation in 2023

Artificial intelligence (AI) has been transforming industries and revolutionizing business operations. AI’s potential to enhance efficiency and productivity has become crucial to many businesses. As we move into 2023, several

data fivetran pricing

Fivetran Pricing Explained

One of the biggest trends of the 21st century is the massive surge in analytics. Analytics is the process of utilizing data to drive future decision-making. With so much of

kubernetes logging

Kubernetes Logging: What You Need to Know

Kubernetes from Google is one of the most popular open-source and free container management solutions made to make managing and deploying applications easier. It has a solid architecture that makes

ransomware cyber attack

Why Is Ransomware Such a Major Threat?

One of the most significant cyber threats faced by modern organizations is a ransomware attack. Ransomware attacks have grown in both sophistication and frequency over the past few years, forcing

data dictionary

Tools You Need to Make a Data Dictionary

Data dictionaries are crucial for organizations of all sizes that deal with large amounts of data. they are centralized repositories of all the data in organizations, including metadata such as