Types of Keys in MS SQL Server Primary, Foreign, Unique, and More Explained
Types of Keys in MS SQL Server Primary, Foreign, Unique, and More Explained
Learn about the different types of keys in MS SQL Server in this detailed tutorial. Keys are essential for database design and data integrity. In this video, we explain:
Primary Key: Ensures each row in a table is unique.
Foreign Key: Establishes relationships between tables.
Unique Key: Enforces uniqueness on a column without making it a primary key.
Composite Key: Combines two or more columns to create a unique identifier.
Candidate Key: Potential keys that can qualify as primary keys.
Alternate Key: A candidate key not chosen as the primary key.
Super Key: A superset of candidate keys that uniquely identify a row.
Whether you're a beginner or an advanced learner, this guide will help you understand the role and importance of keys in SQL Server. With this knowledge, you can improve your database design and query performance!
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TIMESTAMPS
0:00 Intro
00:07 Primary Key:
00:24 Foreign Key:
00:34 Composite Key:
00:38 Unique Key:
00:44 Candidate Key:
00:50 Alternate Key:
01:01 Super Key:
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