SQL DDL, DML & DRL Explained | Database Operations Tutorial for Beginners
In this lecture of Full Stack Web Development NAVTTC (Badge 2) 2026, you will learn about SQL operations, including DDL (Data Definition Language), DML (Data Manipulation Language), and DRL (Data Retrieval Language).
These are the core categories of SQL commands used to manage and interact with databases in real-world applications.
🔹 Topics Covered
✅ DDL (Data Definition Language)
Used to define and manage database structure.
CREATE – Create database and tables
ALTER – Modify table structure
DROP – Delete database or table
TRUNCATE – Remove all records
✅ DML (Data Manipulation Language)
Used to manage data inside tables.
INSERT – Add new records
UPDATE – Modify existing data
DELETE – Remove records
✅ DRL (Data Retrieval Language)
Used to retrieve data from database.
SELECT – Fetch data from tables
Filtering and basic queries
🔹 Practical Examples
Creating tables using DDL
Inserting and updating records using DML
Fetching data using SELECT queries
Real-world database operations
🎯 What You Will Learn
By the end of this lecture, you will be able to:
✔ Understand DDL, DML, and DRL operations
✔ Use SQL commands to manage databases
✔ Create and modify tables
✔ Insert, update, and delete data
✔ Retrieve data using SELECT queries
These concepts are essential for working with MySQL, PHP, and backend development.
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