What is a foreign key in SQL?
An example of an AI chatbot conversation about foreign keys in SQL.
What is a foreign key in SQL?
A foreign key is a field in one table that uniquely identifies a row of another table, establishing a relationship between them.
Can you give me an example of how a foreign key works?
Sure! If you have a 'Customers' table and an 'Orders' table, the 'CustomerID' in the 'Orders' table can be a foreign key referencing the 'CustomerID' in the 'Customers' table.
Why are foreign keys important in database design?
Foreign keys help maintain referential integrity between tables, ensuring that relationships between data remain consistent.
What happens if a foreign key constraint is violated?
If a foreign key constraint is violated, the database will prevent the action that caused the violation, such as deleting a referenced row.
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