SQL Server Course for Beginners with 100+ examples - ALTER TABLE Statement

The video tutorial explains the concept of primary keys in SQL, highlighting their importance in uniquely identifying records in a table. It demonstrates how to set up a database in SQL Server, create a table with a primary key, and insert records into the table. The tutorial also covers executing SQL commands to display records, emphasizing the primary key's role in maintaining data integrity.

What is a primary key and what are its characteristics?

What happens if a primary key column contains NULL values?

Can a table have more than one primary key? Explain your answer.

How can you set a primary key in SQL Server?

Describe the process of inserting records into a table with a primary key.