Question

differentiate between primary key and unique key

Answer 1

Hello there,
Disclaimer : I'm honored to help you but I'm not a big fan of CS, but as far my knowledge goes,
-> A primary key is an ordinary alphabet key on the keyboard, for eg, A key, B key, 4 (number key)
-> Whereas, a unique key (also known as sticky keys) are some unique keys that have different functions, for eg, Ctrl, Num Lock, Page Up..