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Answer:
scope of pet name is limited to pet class and color is accessible to the whole program
Explanation:
Answer:
Join
Explanation:
Five basic set operators in relational algebra are as follows:
- Selection - tuple selection
- Projection - extract columns
- Cartesian product - cross product of relations
- Set union - union of two relations
- Set difference - minus operation on two relations
As we can see, Join is not part of the basic set operations but it is implemented using the Cartesian Product operator.
Answer:
A. taxonomy
Explanation:
A taxonomy can be used to hierarchically represent a classification for a given set of objects or documents.
