SQL Primary Key Explained In Telugu

Описание: Welcome to our SQL tutorial! In this video, you’ll learn all about Primary Keys — one of the most important concepts in database design.
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✅ What is a Primary Key?
✅ Why is it important?
✅ Primary Key constraints in SQL
✅ Difference between Primary Key and Unique Key

A Primary Key uniquely identifies each record.
It cannot contain NULL or duplicate values.
Every table can have only one primary key.

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