What are foreign keys in databases?
An example of an AI chatbot conversation about foreign keys in databases.
What are foreign keys in databases?
Foreign keys are fields in a database table that create a link between two tables. They refer to the primary key in another table.
Why are foreign keys important?
Foreign keys ensure referential integrity between tables, meaning that relationships between data are maintained and valid.
Can you give me an example of how to use foreign keys?
Sure! If you have a 'Customers' table and an 'Orders' table, the 'Orders' table can have a foreign key that references the 'CustomerID' in the 'Customers' table.
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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