Master SQL for Data Analysis - Creating Tables - Constraints

The video tutorial explains various SQL constraints used to maintain data integrity in tables. It covers NULL value constraints, check constraints for data validation, unique constraints to ensure data uniqueness, primary keys as unique identifiers, and foreign keys for referential integrity between tables. Examples using Netflix data illustrate these concepts.

What is the purpose of constraints when creating a new table?

Explain the significance of a NOT NULL constraint in a database table.

What is a CHECK constraint and how is it used?

Describe the UNIQUE constraint and its importance in a database.

What is the role of a primary key in a relational database?

How does a foreign key constraint maintain referential integrity?

What are the steps to create a new table with constraints in SQL?