Question

8. What is difference between Primary key and Composite key?​

Answer 1

Explanation:

Primary key is that column of the table whose every row data is uniquely identified. ... Primary key value can never be null nor can be modified or updated. Composite Key is a form of the candidate key where a set of columns will uniquely identify every row in the table.

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Answer 2

Answer:

Primary key is that column of the table whose every row data is uniquely identified. Every row in the table must have a primary key and no two rows can have the same primary key. Primary key value can never be null nor can be modified or updated.

Composite Key is a form of the candidate key where a set of columns will uniquely identify every row in the table