In mathematics, a relation is a set of ordered pairs.
Strictly speaking, the relations of database theory are different objects, but closely related. (Yes, I just made an awesome pun.)
I'm surprised that the author didn't include "a relation is a set of tuples" as a definition in the article. Also, absolutely nothing is said about viewing a relation as a graph.
Comments
In mathematics, a relation is a set of ordered pairs.
Strictly speaking, the relations of database theory are different objects, but closely related. (Yes, I just made an awesome pun.)
I'm surprised that the author didn't include "a relation is a set of tuples" as a definition in the article. Also, absolutely nothing is said about viewing a relation as a graph.