If there is a combination of two or more attributes which is being used as the primary key then we call it as

Composite Keys.

Wubba Lubba Dub-Dub :))

you already know many words that you use every day as part of your writing and you probably also know that certain words fit better in certain situations. tonight she will , sit) down and , write) a cover letter to when writing, you need to choose the correct word according to its spelling and