LU06c - SQL-DDL: Constraint Management - Under Construction

Source:

• W3Schools | Constraints | Overview
• W3Schools | Constraints | FOREIGN KEY
• W3Schools | Constraints | PRIMARY KEY
• W3Schools | Constraints | NOT NULL
• W3Schools | Constraints | UNIQUE

1. Discuss what database Constraints are and for they are needed
2. Explain the four most important CONSTRAINTS in database systems
3. Apply constraints to entity and realation tables in databases

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Volkan Demir