What are database constraints?
An example of an AI chatbot conversation about database constraints in databases.
What are database constraints?
Database constraints are rules that limit the type of data that can be stored in a database. They ensure data integrity.
Can you give me examples of different types of constraints?
Sure! Common types include NOT NULL, UNIQUE, PRIMARY KEY, FOREIGN KEY, and CHECK constraints.
What is the purpose of a FOREIGN KEY constraint?
A FOREIGN KEY constraint ensures that the value in one table matches a value in another table, maintaining referential integrity.
How do constraints affect database performance?
Constraints can improve performance by ensuring data integrity, but they may also slow down insert and update operations due to checks.
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