Which one of the following refers to the "data about data" ?

A logical schema ?

In a relation database, every tuples divided into the fields are known as the ?

Which of the following command is correct to delete the values in the relation teaches ?

The term "Data" refers to ?

Which of the following is known as the process of viewing cross-tab with a fixed value of one attribute ?

Which of the following is known as a set of entities of the same type that share same properties, or attributes ?

__________ is a set of one or more attributes taken collectively to uniquely identify a record ?