Xtranet Technologies NET Interview Questions and Answers

Primary key uniquely identifies each record in a table, while unique key ensures that each value in a column is unique.

• Primary key does not allow NULL values, while unique key allows one NULL value.

• A table can have only one primary key, but multiple unique keys.

• Primary key automatically creates a unique index, while unique key does not.

• Primary key is used to establish relationships between tables, while unique key is u