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Question 1: What is the objective of a query simplifier? What are the idempotence rules used by query simplifier? Give an example to explain the concept.
Question 2: What are query transformation rules?
Question 3: Discuss the rules for transformation of query trees and identify when each rule should be applied during optimization.
Question 4: Discuss the main cost components for a cost function that is used to estimate query execution cost.
Question 5: What cost components are used most often as the basis for cost functions?
What benefits does it bring and what potential problems will it bring
Define a class named Document that have an instance variable of type String named text that stores any textual content for the file. Design a technique named toString that returns the text field and also include a method to set this value.
With indicated link costs, use Djkstra's shortest path algorithm to calculate shortest path from E to all network nodes. Illustrate how algorithm works by computing table.
Divide 16 digit value N by six digit integer D obtaining quotient Q and remainder (or sign of the remainder) R by division algorithms.
People from 3-different income levels, A, B, and C, rated each of 2-different items with a number 0 through 10. Create a file in which each line contains the income level and item rankings for one respondent.
in this assignment you will write an essay on protein requirements. begin by performing an internet search for high
What are preorder, Inorder, postorder traversals of a binary tree? Design recursion algorithms to implement them and explain with the help of an example.
Sometimes ISDNs are used in locations that do not support DSL or cable modem connections. Your selections may be analog modems or an ISDN connection in those remote locations.
Assume if the last digit of a 2's complement binary number is 0, then number is even. If the last two digits of a 2's complement binary number are 00
Construct an entity-relationship (ER) model for the database. Make sure you include in your model details of entities, relationships, attributes, keys and limits in participation.
Premium Airlines has currently offered to settle claims for a class action suit, which was originated for alleged price fixing of tickets. The settlement is stated as follows. Create a decision tree for this condition.
Assume you have been asked to help new students identify ways in which they can manage their time so that they can be successful in an online learning environment.
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