Can you explain what a foreign key is in databases?
A foreign key is a field in one table that uniquely identifies a row of another table, establishing a relationship.
Why are foreign keys important in relational databases?
Foreign keys ensure referential integrity, meaning they help maintain consistent and valid relationships between tables.
Can you give me an example of how a foreign key works?
Sure! In a database with 'Customers' and 'Orders' tables, the 'Orders' table might have a foreign key linking to 'Customers' to show which customer made each order.
What happens if a foreign key is violated?
If a foreign key constraint is violated, the database will prevent the action that caused the violation, ensuring data integrity.
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