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The ER (Entity-Relationship) model is a graphical representation used to design databases. On the other hand, the relational model is a mathematical representation that outlines the connections between database tables. After creating the system’s ER diagram, we must translate it into relational models, which can be instantly implemented by any RDBMS, such as Oracle, MySQL, […]
February 23, 2023 | DBMS | No comments
Relational Algebra is a procedural query language, which takes Relation as input and generates relation as output. SQL and relational databases primarily have their theoretical underpinnings in relational algebra. In relational algebra, the input typically consists of a collection of one or more relations, and the output typically consists of another relation that illustrates the […]
February 21, 2023 | DBMS | No comments
A relational database management system (RDBMS) is a group of tools and features that enables IT teams and other users to build, maintain, and interact with relational databases in various ways. Most commercial relational database management systems (RDBMS) use Structured Query Language (SQL) to access the databases, which are stored as tables in RDBMS. However, […]
February 19, 2023 | DBMS | No comments
After conducting extensive research on the Relational Model of database systems, Dr. Edgar F. Codd developed twelve rules that, in his opinion, a database must adhere to in order to be considered a true relational database.(Codd proposed 13 rules popularly known as Codd’s 12 rules to test DBMS’s concept against his relational model. ) Any database management system […]
February 18, 2023 | DBMS | No comments
An ER diagram is a visual representation of the entities, attributes, and relationships between them in a database. Entities represent real-world objects or concepts that are important to the business or organization. For example, in a university database, entities might include students, courses, and instructors. Attributes are the characteristics of an entity. For example, the […]
February 17, 2023 | DBMS | No comments
The ER (Entity-Relationship) model is a conceptual data model used in database design. It represents the data in terms of entities, attributes, and relationships. Here are the basic concepts of the ER model: Entity: An entity is a real-world object, concept or thing with an independent existence that can be easily distinguished from other objects. […]
February 15, 2023 | DBMS | No comments
What are Data Models in DBMS? In database management systems (DBMS), a data model is a conceptual representation of data structures, relationships, constraints, and rules used to organize, manipulate and store data. A data model provides a way to describe the structure of a database and how data is stored, retrieved, and updated. There are […]
February 15, 2023 | DBMS | No comments
The architecture of the DBMS affects how it is designed. When dealing with a sizable number of PCs, web servers, database servers, and other components connected by networks, the fundamental client/server architecture is used.A workstation and numerous PCs connected by a network make up the client/server architecture.How users connect to the database to complete their […]
February 11, 2023 | DBMS, Uncategorized | No comments
A database management system (DBMS) is a software system designed to manage the storage, retrieval, and manipulation of data in a database. The following are the components of a DBMS: Hardware Software Data Procedures Database Access Language 1. Hardware: The hardware components of a DBMS play a crucial role in storing, retrieving, and processing data. […]
February 11, 2023 | DBMS, Uncategorized | No comments
What is Data? Data is nothing more than raw, unfiltered facts and statistics that are stored or freely flowing through a network. When processed, data transforms into information, which gives it meaning. What is a Database? A database is a group of connected data that facilitates effective data retrieval, insertion, and deletion. The data is […]
February 9, 2023 | DBMS, Uncategorized | No comments