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Li-Fi vs Wi-Fi: A Battle of Light and Waves

Li-Fi vs Wi-Fi: A Battle of Light and Waves Li-fi is a light fidelity device that supports only the infrared and other lighting systems to transfer the data to the device which is used to receive from the sender device. Wifi is a wireless fidelity device that supports the radio waves to transfer the data to the wifi device which is used to receive the wifi signals at the limited ranges due to the device version capacity. Introduction to the computer system and computer applications related topics are listed following below here: Li-Fi vs Wi-Fi: A Battle of Light and Waves Let’s discuss the computer system related topic and questions above listed and their answers are following below here: Li-Fi vs Wi-Fi: A Battle of Light and Waves There are some points on the computer system and data communication related to the topic of “Li-Fi vs Wi-Fi: A Battle of Light and Waves” following below here: Lifi based data communication system:- Li-Fi is a light based signal data transmission ...
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Which characteristic of the record is too important and necessary to apply in the [RDBMS] Relational Database Management System?

Which characteristic of the record is too important and necessary to apply in the [RDBMS] Relational Database Management System?

Main characteristic of the record in the Relational Database

In the Record of the Relation database there are so many characteristics or properties and attribute to shows uniqueness of the record but there is one attribute that identify the record is unique to shows there uniqueness. There are some points to follow below to understand the type of attribute and it work.

  • The unique attribute of the record in the relational database is called primary key.
  • It is also called key attribute in the database property.
  • The primary key attribute take numerical data in their field.
  • It also called auto number in the table database.
  • It automatically counts the serial numbers and inserts in the field of the record.
  • Serial key attribute is the best way to find the record easily in the RDBMS.
  • The primary key is also important role in the Relational database because when you manipulating the data in the record you have to give the id number of the record which is applied by the queries on the relational database.

How to use the primary key attribute on the records in the database?

To find the records using primary key

Suppose you had applied the primary key attribute on all the records in the database. You can use the SELECT keyword apply and find the particular record in the database. There are some steps to find the records from the database by using a SELECT query with the primary key attribute.

Steps to apply the select query with the primary key attribute on the database to find a particular record

  • Open your code editor of your database server.
  • Type SELECT keyword then * asterisk primary key numbers column (s) from table database name.
  • This is a syntax of finding a particular record from the database.

Can a primary key be important for RDBMS?


A 2D digital illustration showing a database icon, a golden key labeled 'PRIMARY KEY', and a table symbol, with the question 'Can a primary key be important for RDBMS?' displayed at the top.


Yes, it is true that the primary key is an attribute to provide the unique data to identify the information based on the Primary key on the Relational database.
The primary key is used to provide the new database according to the primary key because it is used to define every record has a unique value from all types of record such as:- employee has identity number is unique to the company as a registration number on the Identity card provided to the employee from the company.
The primary key is key attribute which is basic to identify the record has unique information for the user who wants to find the information then the user need to apply the primary key on the select command to see the record information stored in the table or relational database file.

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What are the components of data model in [DBMS] Relational Database Management System?

There are five main components of data model... 👉 click here 👈

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