Basics of Database Part 01

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 What is Database?


A database is a collection of information organized for easy access, management, and maintenance.

Exp: Customer data

         Product Inventory etc.



Types of Data Models


- Record-based logical model

- Hierarchical Data Model

- Network Data Model

- Relational Data Model


- Object-based logical model

- Entity relationship model


DBMS Operations

- Adding new files

- Inserting data

- Retrieving data

- Modifying data

- Removing data

- Removing files


Advantages of DBMS

- Sharing of data across applications

- Enhanced security mechanism

- Enforce integrity constraints

- Better transaction support 

- Backup and recovery features


Introduction to RDBMS


- A relational database refers to a database that stores data in a structured format, using rows and columns.


- This makes it easier to locate and access specific values within the database.


- It is "relational" because the values within each table are related to each other. tables may also be related to other tables.


- The Relational structure makes it possible to run queries across multiple tables at once.


Features of RDBMS


- Every piece of information is stored in the form of tables.

- Has primary key for unique identification of rows.

- Has foreign keys to ensure data integrity.

- Provide SQL for data access.

- Uses indexes for faster data retrieval.

- Gives access privileges to ensure data security.




 #data #database #management #security #maintenance #day1 #basics #datasecurity


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