IMImobile Interview Questions and Answers

Primary key uniquely identifies a record, while foreign key refers to a field in another table.

• Primary key is used to enforce data integrity and ensure uniqueness of records.

• Foreign key is used to establish a relationship between two tables.

• Primary key cannot be null, while foreign key can be null.

• Primary key is always unique, while foreign key may have duplicate values.

• Example: Customer table has a primary key of Cust...read more