What are primary keys in a database?
An example of an AI chatbot conversation about primary keys in databases.
What are primary keys in a database?
Primary keys are unique identifiers for records in a database table, ensuring each entry is distinct.
Why are primary keys important?
They ensure data integrity and enable efficient data retrieval by uniquely identifying each record.
Can a table have multiple primary keys?
No, a table can only have one primary key, but that key can consist of multiple columns, known as a composite key.
What happens if a primary key is duplicated?
If a primary key is duplicated, the database will reject the entry, maintaining the uniqueness constraint.
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