Any recursive view must be defined as the union of two subqueries: a _______ query that is nonrecursive and a __________ query.
A. Base, recursive
B. Recursive, Base
C. Base, Redundant
D. View, Base
Answer:A
Any recursive view must be defined as the union of two subqueries: a _______ query that is nonrecursive and a __________ query.
A. Base, recursive B. Recursive, Base C. Base, Redundant D. View, Base
Explanation:First compute the base query and add all the resultant tuples to the recursively defined view relation. 2. Ranking of queries is done by which of the following ?