Author Question: EXISTS and NOT EXISTS are actually just another form of correlated subqueries. Indicate whether ... (Read 42 times)

mmm · **on:** Jul 7, 2018

EXISTS and NOT EXISTS are actually just another form of correlated subqueries.

Indicate whether the statement is true or false

Question 2

Which of the following is not true about a relation?

A) Has rows containing data about an entity
B) Has columns containing data about attributes of the entity
C) Has cells that hold only a single value
D) Can have two identical rows