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MySQL RDBMS

What is MySQL RDBMS?

MySQL is a Relational Database Management System (RDBMS) that stores data in structured tables with relationships between them. It follows the relational model, meaning data is stored in rows and columns, and tables can be linked using primary keys and foreign keys.

Key Features of RDBMS (MySQL Included)

Structured Data Storage – Data is stored in tables with defined structures.

Relationships Between Tables – Tables can be linked using foreign keys.

SQL Language Support – Uses SQL for querying, inserting, updating, and deleting data.

ACID Compliance – Ensures Atomicity, Consistency, Isolation, and Durability for data integrity.

Multi-User Access – Supports multiple users accessing the database simultaneously.

Data Security – Provides authentication, user roles, and privileges.

Indexes for Fast Querying – Speeds up searches using indexes.

Scalability – Can handle small to large-scale applications.

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Advantages of MySQL as an RDBMS

✔ Easy to Use – Simple SQL queries for database management.

✔ Open-Source – Free and widely supported.

✔ Cross-Platform – Works on Windows, Linux, macOS, etc.

✔ Performance – Fast and optimized for web applications.

✔ Security – Provides user access control and encryption.

✔ Scalability – Can handle small to large datasets.

✔ Replication & Backup – Supports master-slave replication for data backup.

Example: Student Management System

Let's create a relational database with two tables:

students – Stores student information linked to courses
courses – Stores course details

student_id	name	gender	city	age	score	course_id	email	phone_number
1	Alice	Female	Delhi	20	85	101	NULL	1234567890
2	Bob	Male	Mumbai	22	75	NULL	bob@email.com	NULL
3	Charlie	Male	Delhi	21	95	102	NULL	NULL
4	David	Male	Bangalore	23	65	101	david@email.com	NULL
5	Eve	Female	Mumbai	20	80	103	NULL	NULL
6	Frank	Male	Delhi	22	90	103	NULL	NULL
7	Alice	Female	Mumbai	19	60	102	NULL	NULL

The columns in the "Students" table above are: student_id, name, age, email. The table has 2 records (rows).

student_id is the Primary Key (unique identifier for each student).
course_id is a Foreign Key, linking courses to students.

Courses Table (Related to Students Table)

The columns in the "Courses" table above are: course_id, course_name, student_id. The table has 2 records (rows).

course_id is the Primary Key (unique identifier for each student).

course_name	course_name
101	Math
102	Science
103	History
104	English

The relationship between the "Courses" table and the "Students" table is the course_id column:

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