Notes

Number System A numeral system is a writing system for expressing numbers; that is, a mathematical notation for representing numbers of a given set, using digits or other symbol in…

Backup: Backup refers to the process of creating duplicate copies of data to safeguard it against loss, corruption, or accidental deletion. It is an essential part of data management and…

Transaction A transaction is a set of operations used to perform a logical unit of work. A transaction usually represents change in database.It is the result of a request made…

Functional Dependency In a relational database management, functional dependency is a concept that specifies the relationship between two sets of attributes where one attribute determines the value of another attribute.…

DBMS Language Database server is an important function for many individuals and companies, providing a particular way to organize and store information on a computer. In programming, developers use database…

Relational Model Relational Model represents the database as a collection of relations. A relation is nothing but a table of values. Every row in the table represents a collection of…

Entity Relationship Model Relationships are created by dividing object of interest into entity and its characteristics into attributes. ER models are defined to represent relationship into pictorial form to make…

Data: Data is a collection of raw facts, such as number, words, measurements, observations or just description of things. Information: Information is a classified or organized data which has some…

Introduction to backup "Backup" refers to the process of copying and archiving data so that it can be used to restore the original after a data loss event. Restoring data…

Repair and maintenance Repair is the restoration work when an asset is broken, damaged, or non-functional. Maintenance refers to regular activities and/or corrective or preventive repairs performed on equipment to…