Скачать или смотреть Keys in the Relational Model | Types of Keys in DBMS with Examples

🔑 Keys in the Relational Model | Types of Keys in DBMS 🔑

In this video, we explore the concept of keys in the relational model and their significance in maintaining data integrity and uniqueness. Keys play a crucial role in identifying records and establishing relationships between tables in a relational database.

📌 Topics Covered:
✅ Super Key – A set of attributes that uniquely identify a tuple.
✅ Candidate Key – Minimal super key with no redundant attributes.
✅ Primary Key – A unique and minimal key chosen to identify records.
✅ Alternate Key – Candidate keys that are not chosen as the primary key.
✅ Foreign Key – A key that establishes a relationship between tables.
✅ Composite Key – A key consisting of multiple attributes.
✅ Unique Key – Ensures uniqueness but allows NULL values.

💡 Why Are Keys Important?

Ensure uniqueness of records.
Maintain data integrity and consistency.
Establish relationships between tables.
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