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In a relational database, what is the purpose of a foreign key?
Practice Questions
Q1
In a relational database, what is the purpose of a foreign key?
To uniquely identify a record
To establish a relationship between two tables
To enforce data integrity
To improve query performance
Questions & Step-by-Step Solutions
In a relational database, what is the purpose of a foreign key?
Steps
Concepts
Step 1: Understand that a relational database stores data in tables.
Step 2: Know that each table can have a unique identifier called a primary key.
Step 3: A foreign key is a field in one table that links to the primary key of another table.
Step 4: This link creates a relationship between the two tables.
Step 5: The purpose of the foreign key is to ensure data integrity and to allow for easy retrieval of related data.
No concepts available.
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