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Database Systems Management
·
Module 3
Keys and Relationships
1
Understanding Primary Keys: Unique Identifiers
Define what a primary key (PK) is and explain its role in uniquely identifying entity instances.
2
Composite Primary Keys: Definition and Application
Define a composite primary key and identify when it is necessary.
3
Selecting Primary Keys
Evaluate candidate keys and select an appropriate primary key for a given entity.
4
Understanding Foreign Keys and Their Role in Relational Databases
Define what a foreign key (FK) is and explain its role in linking related tables.
5
Identifying Foreign Keys in Relational Databases
Identify foreign keys in a given set of related tables.
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Entities and Attributes
Next module
Relationship Analysis and Cardinality