Heuristic optimization transforms the query-tree by using a set of rules that typically (but not in all cases) improve execution performance .It uses which rules to do soSelect one:a.Perform selection early (reduces the number of tuples)b.Perform most restrictive selection and join operations (i.e., with smallest result size) before other similar operations.c. All of the aboved.Perform projection early (reduces the number of attributes)
Question
Heuristic optimization transforms the query-tree by using a set of rules that typically (but not in all cases) improve execution performance .It uses which rules to do soSelect one:a.Perform selection early (reduces the number of tuples)b.Perform most restrictive selection and join operations (i.e., with smallest result size) before other similar operations.c. All of the aboved.Perform projection early (reduces the number of attributes)
Solution
Heuristic optimization transforms the query-tree by using a set of rules that typically (but not in all cases) improve execution performance. It uses which rules to do so?
a. Perform selection early (reduces the number of tuples) b. Perform most restrictive selection and join operations (i.e., with smallest result size) before other similar operations. c. All of the above. d. Perform projection early (reduces the number of attributes)
Similar Questions
Which is used to improve the performance of heuristic search?Question 9Answera. Quality of heuristic functionb.Quality of nodesc.Simple form of nodesd.None of the mentioned
1. How can we optimize the query performance during the selection refinement process?
cost-based query optimization consist ofSelect one:a.Annotate resultant expressions to get alternative query plansb.Generating logically equivalent expressions using equivalence rulesc.Choose the cheapest plan based on estimated costd.All of the above
What are some advanced query optimization techniques not mentioned earlierReview LaterUsing stored procedures instead of ad-hoc queries.Utilizing query hints to force specific execution plans.Employing database partitioning for large tables.Implementing data caching mechanisms.
What is a heuristic function, and why is it important in A* search?
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.