Скачать или смотреть Session 2 | Day 2 | ALTER AND CONSTRAINT | Learn SQL | SQL for Beginner's

In this video, you’ll learn how to use the ALTER statement and work with CONSTRAINTS in SQL. We’ll cover how to modify existing tables, add or drop columns, and apply important constraints like PRIMARY KEY, FOREIGN KEY, UNIQUE, NOT NULL, and CHECK to maintain data integrity.

Whether you’re a beginner or brushing up on SQL, this tutorial will give you clear explanations and practical examples to help you confidently use ALTER and CONSTRAINTS in your own projects.

✅ Topics Covered:

ALTER TABLE basics

Adding and dropping columns

Adding and removing constraints

Understanding primary key, foreign key, unique, not null, and check constraints

Real-world examples and best practices

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Tags:
#SQL #SQLTutorial #LearnSQL #SQLforBeginners #ALTER #Constraints #PrimaryKey #ForeignKey #Database #MySQL #PostgreSQL #SQLQueries #DataIntegrity #SQLTraining #DatabaseDesign