DATABASE SYSTEMS
13th Edition
ISBN: 9780357095607
Author: Coronel
Publisher: CENGAGE L
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Chapter 11, Problem 32P
Problems 29–32 are based on the following query:
| SELECT | CUS_CODE, MAX(LINE_UNITS*LINE_PRICE) |
| FROM | CUSTOMER NATURAL JOIN INVOICE NATURAL JOIN LINE |
| WHERE | CUS_AREACODE = '615' |
| GROUP BY | CUS_CODE; |
How would you rewrite the query to ensure that the index you created in Problem 31 is used?
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% At this point We Enter the Resistor values and Voltage Source Values
fprintf('Provide Resistance Values for the Resistors as Requested: \n');
fprintf('===============================================\n');
R1x = input('Enter the value for R1 in kohms: ');
R2x = input('Enter the value for R2 in kohms: ');
R3x = input('Enter the value for R3 in kohms: ');
R4x = input('Enter the value for R4 in kohms: ');
fprintf('Provide voltage values for as requested: \n');
fprintf('===============================================\n');
E1 = input('Enter the value of E1 in Volts: ');
E2 = input('Enter the value of E2 in Volts: ');
E3 = input('Enter the value of E3 in Volts: ');
fprintf('===============================================\n');
% Scaling FACTOR multiplication of resistors by 1000 (1K) each
R1 = 1000 * R1x;
R2 = 1000 * R2x;
R3 = 1000 * R3x;
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fprintf('VALUES YOU HAVE ENTERED FOR YOUR…
Suppose that the two Rank methods below are added to the Skip List class on Blackboard.
public int Rank(T item)
Returns the rank of the given item.
public T Rank(int i)
Returns the item with the given rank i.
Requirements
1. Describe in a separate Design Document what additional data is needed and how that data is used to
support an expected time complexity of O(log n) for each of the Rank methods. Show as well that the
methods Insert and Remove can efficiently maintain this data as items are inserted and removed. (7
marks)
2. Re-implement the methods Insert and Remove of the Skip List class to maintain the augmented data in
expected O(log n) time. Using the Contains method, ensure that added items are distinct. (6 marks)
3. Implement the two Rank methods. (8 marks)
4. Test your new methods thoroughly. Include your test cases and results in a Test Document. (4 marks)
Why do we need official standards for copper cable and fiber-optic cable? What happens without the standard?
Chapter 11 Solutions
DATABASE SYSTEMS
Ch. 11 - Prob. 1RQCh. 11 - What index should you create? Write the required...Ch. 11 - What is the focus of most performance-tuning...Ch. 11 - What are database statistics, and why are they...Ch. 11 - How are database statistics obtained?Ch. 11 - What database statistics measurements are typical...Ch. 11 - How is the processing of SQL DDL statements (such...Ch. 11 - In simple terms, the DBMS processes a query in...Ch. 11 - If indexes are so important, why not index every...Ch. 11 - What is the difference between a rule-based...
Ch. 11 - Prob. 11RQCh. 11 - What are some general guidelines for creating and...Ch. 11 - Prob. 13RQCh. 11 - Prob. 14RQCh. 11 - Prob. 15RQCh. 11 - SELECT SELECT EMP_LNAME, EMP_FNAME, EMP_AREACODE,...Ch. 11 - Problem 1 and 2 are based on the following query:...Ch. 11 - Using Table 11.4 as an example, create two...Ch. 11 - Problems 46 are based on the following query:...Ch. 11 - Problems 46 are based on the following query:...Ch. 11 - Prob. 6PCh. 11 - Problems 732 are based on the ER model shown in...Ch. 11 - Problems 732 are based on the ER model shown in...Ch. 11 - Problems 732 are based on the ER model shown in...Ch. 11 - Problems 732 are based on the ER model shown in...Ch. 11 - Problems 1114 are based on the following query:...Ch. 11 - Problems 1114 are based on the following query:...Ch. 11 - Problems 1114 are based on the following query:...Ch. 11 - Problems 1114 are based on the following query:...Ch. 11 - Problems 15 and 16 are based on the following...Ch. 11 - Problems 15 and 16 are based on the following...Ch. 11 - Problems 1721 are based on the following query:...Ch. 11 - Problems 1721 are based on the following query:...Ch. 11 - Prob. 19PCh. 11 - Prob. 20PCh. 11 - Problems 1721 are based on the following query:...Ch. 11 - SELECT SELECT P_CODE, P_DESCRIPT, P_PRICE,...Ch. 11 - Problems 2224 are based on the following query:...Ch. 11 - Problems 2224 are based on the following query:...Ch. 11 - Problems 25 and 26 are based on the following...Ch. 11 - Problems 25 and 26 are based on the following...Ch. 11 - Prob. 27PCh. 11 - Problems 27 and 28 are based on the following...Ch. 11 - Problems 2932 are based on the following query:...Ch. 11 - Problems 2932 are based on the following query:...Ch. 11 - Problems 2932 are based on the following query:...Ch. 11 - Problems 2932 are based on the following query:...
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