Query Processing & Optimization -Query Equivalence Rules

This video explains the rules that can make two queries equivalent and help in transforming queries into optimized queries.

Review Questions:
1. What are query equivalence rules?
2. Explain the rule for conjunctive selection operations.
3. Are selection operations commutative?
4. Are all the projection operations in a sequence of projection operations necessary?
5. How can you combine selections with Cartesian products and theta joins?
6. Are theta joins commutative?
7. Are natural join operations associative?