Question

DIFFERENCE BETWEEN PRIMARY KEY AND FOREIGN KEY

Answer 1

Answer:

primary key

A primary key is a special relational database table column (or combination of columns) designated to uniquely identify all table records. A primary key's main features are: It must contain a unique value for each row of data. It cannot contain null values.

Special key

A special key or media key is a keyboard key that performs a special function not included with the traditional 104-key keyboard. ... Special keys are found on keyboards often referred to as multimedia keyboards.

Answer 2

Answer:

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