What are key constraints in databases?
An example of an AI chatbot conversation about key constraints in databases.
What are key constraints in databases?
Key constraints are rules that ensure the integrity of data in a database. They define how data can be uniquely identified.
Can you explain the different types of key constraints?
Sure! The main types are Primary Key, Foreign Key, Unique Key, and Composite Key. Each serves a specific purpose in maintaining data integrity.
What is the difference between a primary key and a foreign key?
A primary key uniquely identifies a record in a table, while a foreign key is a field that links to the primary key of another table, establishing a relationship.
Why are key constraints important in database design?
They are crucial for maintaining data accuracy, preventing duplicate records, and ensuring relationships between tables are valid.
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