How can I ensure data integrity in my SQL database?
An example of an AI chatbot conversation about ensuring data integrity in SQL databases.
How can I ensure data integrity in my SQL database?
To ensure data integrity in your SQL database, you can use constraints like PRIMARY KEY, FOREIGN KEY, UNIQUE, and CHECK.
What are the differences between these constraints?
PRIMARY KEY uniquely identifies each record, FOREIGN KEY maintains referential integrity, UNIQUE ensures all values are different, and CHECK enforces specific conditions.
Can you give me an example of using a FOREIGN KEY?
Sure! In a 'Orders' table, you can have a FOREIGN KEY that references the 'Customers' table to ensure each order is linked to a valid customer.
What happens if I try to insert a record that violates a constraint?
If you try to insert a record that violates a constraint, the database will reject the operation and return an error.
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