What is a primary key?
An example of an AI chatbot conversation about primary keys in databases.
What is a primary key in a database?
A primary key is a unique identifier for a record in a database table, ensuring that no two records have the same key.
Why is it important to have a primary key?
It's crucial because it maintains data integrity and allows for efficient data retrieval and relationships between tables.
Can a primary key be null?
No, a primary key cannot be null. It must always contain a value to uniquely identify a record.
What are some examples of primary keys?
Common examples include user IDs, email addresses, or any unique identifier like a Social Security number.
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