Difference Between Primary Key and Unique Key in SQL Server | SQL Interview Shorts

Описание: Hello everyone! Welcome to SKLEARNING SQL Server Interview Shorts. In this video, we’ll explore the key differences between Primary Key and Unique Key in SQL Server, essential concepts for database design.

✨ Key Takeaways:

Primary Key:

Acts as a unique identifier for each row in a table.
Cannot accept NULL values.
Only one primary key is allowed per table.
Automatically creates a clustered index.
Supports auto-increment.
Cannot be modified or deleted easily.
Unique Key:

Uniquely identifies rows that aren’t part of the primary key.
Can accept NULL values.
Allows multiple unique keys in a table.
Creates a non-clustered index.
Does not support auto-increment.
Values can be modified if necessary.
💡 Usage:

Use Primary Key for uniquely identifying rows.
Use Unique Key to enforce data uniqueness while allowing NULL values.
If you found this video helpful, don’t forget to like, share, and comment.
Subscribe to SKLEARNING for more SQL tips and tutorials! 🚀

🔔 Stay tuned for more SQL Server interview prep content!

#SQL #SQLServer #PrimaryKeyvsUniqueKey #SQLInterviewQuestions #LearnSQL #SKLEARNING
PLEASE: LIKE|SHARE |COMMENT| SUBSCRIBE.

you can also visit:https://sklearning.in/

Programming code :https://github.com/skgiri490/sklearning

you can also buy the e-book: https://imojo.in/sklearning

********************************************************************************