In the Venetian Blind schema design, named complex types, element groups, and attribute groups can be ______ throughout the schema.

All of the following are TRUE of virus protection software packages EXCEPT ________

A) virus definitions can be updated with a single click B) you can only scan the entire computer each time you do a scan C) specific removable drives can be scanned D) they have sophisticated user interfaces

What is the purpose of setting a relationship between two tables?

What will be an ideal response?