After inserting the header, press Ctrl + Z to close the header screen and return to the document

Which of the following types of storage has a relatively low price per GB, fast transfer speed, and is secure inside a system unit?

A) Flash drive B) CD/DVD drive C) External hard drive D) Internal hard drive

Define the following terms and give one example of each.

1. Equijoin 2. Outer join 3. Self-join 4. Minus 5. Cartesian product