Modern Database Management
13th Edition
ISBN: 9780134773650
Author: Hoffer
Publisher: PEARSON
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Chapter 8, Problem 8.60PAE
Program Plan Intro
Provide an indexing solution for the given situation of
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I have tried but not able. Please respondAn employee of JC Consulting created the query shown in Figure 2-48. He wants to list the client name, project ID, and task description for each task assigned to the projects for that client. Will this query be successful? If not, what needs to change in order for this query to work correctly?
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An employee of JC Consulting created the query shown in Figure 2-48. He wants to list the client name, project ID, and task description for each task assigned to the projects for that client. Will this query be successful? If not, what needs to change in order for this query to work correctly?
Can someone help me with this problem?
What types of changes in the DBA's workload may be anticipated as a consequence of the DBMS's use of numerous heuristic rules and cost estimate algorithms during query optimisation?
Chapter 8 Solutions
Modern Database Management
Ch. 8 - Prob. 8.1RQCh. 8 - Prob. 8.2RQCh. 8 - Prob. 8.3RQCh. 8 - Prob. 8.4RQCh. 8 - Prob. 8.5RQCh. 8 - Prob. 8.6RQCh. 8 - Prob. 8.7RQCh. 8 - Prob. 8.8RQCh. 8 - Explain why you sometimes have to reserve much...Ch. 8 - Why are field values sometimes coded?
Ch. 8 - Prob. 8.11RQCh. 8 - Prob. 8.12RQCh. 8 - Explain why normalized relations may not comprise...Ch. 8 - Prob. 8.14RQCh. 8 - List three common situations that suggest that...Ch. 8 - Explain the reasons why some experts are against...Ch. 8 - Prob. 8.17RQCh. 8 - Prob. 8.18RQCh. 8 - Prob. 8.19RQCh. 8 - Prob. 8.20RQCh. 8 - Prob. 8.21RQCh. 8 - Prob. 8.22RQCh. 8 - One of the strongest recommendations regarding...Ch. 8 - Explain why an index is useful only if there is...Ch. 8 - Indexing can clearly be very beneficial. Why...Ch. 8 - Prob. 8.26RQCh. 8 - Prob. 8.27RQCh. 8 - Describe the role of data dictionary in the...Ch. 8 - Prob. 8.29RQCh. 8 - Prob. 8.30RQCh. 8 - Explain how creating a view may increase data...Ch. 8 - Prob. 8.32RQCh. 8 - Prob. 8.33RQCh. 8 - Prob. 8.34RQCh. 8 - Prob. 8.35RQCh. 8 - Prob. 8.36RQCh. 8 - Prob. 8.37RQCh. 8 - Prob. 8.38RQCh. 8 - Prob. 8.39RQCh. 8 - How can views be used as part of data security?...Ch. 8 - Prob. 8.41RQCh. 8 - Prob. 8.42RQCh. 8 - Consider the following two relations for...Ch. 8 - Prob. 8.44PAECh. 8 - Prob. 8.45PAECh. 8 - Prob. 8.46PAECh. 8 - Prob. 8.47PAECh. 8 - Suppose you are designing a default value for the...Ch. 8 - When a student has not chosen a major at a...Ch. 8 - Prob. 8.50PAECh. 8 - Prob. 8.51PAECh. 8 - Consider the relations in Problem and Exercise...Ch. 8 - Prob. 8.53PAECh. 8 - Prob. 8.54PAECh. 8 - Prob. 8.55PAECh. 8 - Prob. 8.56PAECh. 8 - Prob. 8.57PAECh. 8 - Consider the relations specified in Problem and...Ch. 8 - Prob. 8.59PAECh. 8 - Prob. 8.60PAECh. 8 - Prob. 8.61PAECh. 8 - Prob. 8.62PAECh. 8 - Prob. 8.63PAECh. 8 - Prob. 8.64PAECh. 8 - Problems and Exercises 8-65 through 8-68 refer to...Ch. 8 - Prob. 8.66PAECh. 8 - Problems and Exercises 8-65i5 through 8-68 refer...Ch. 8 - Refer to Figure 4-5 0. For each of the following...Ch. 8 - Prob. 8.69PAECh. 8 - Prob. 8.70PAECh. 8 - Prob. 8.71PAECh. 8 - Prob. 8.72PAECh. 8 - Prob. 8.73PAECh. 8 - Prob. 8.74PAECh. 8 - Prob. 8.75PAECh. 8 - Prob. 8.76PAECh. 8 - Prob. 8.77PAE
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- Explain the eight possible cost estimate approaches and heuristic criteria that the DBMS utilises in order to optimise the query. Also, describe how this affects the amount of work that the DBA has to complete.arrow_forwardExplain the eight possible cost estimate approaches and heuristic criteria that the DBMS utilises in order to optimise the query. Also, describe how this influences the amount of work that the DBA has to complete.arrow_forwardConsidering the table Employee (id, designation, salary, location, email, phone) Construct down queries for the following 1) Find those employees whose id b/w 1001 - 1010 and their designation = "Manager"; 2) Select designation of those in which is their gross sal > = 50000 3) Find basic salary of those whose annual salary is b/w 100000 to 500000 4) Find location, email, ph# of those whose medical allowance > 40000 5) Give increment of 10000 of those employees whose b.salary < = 15000 and annual sal < = 80000 6) Calculate 15% tax on those employees whose gross salary > = 100000 7) Find designation of those employees whose medical allowance is b/w 50000 and 70000 8) Calculate net sal (which is gross sal - tax) of all employees 9) Find dept.id of those employees whose deg = GM and their gross sal > = 10pes whose b.sal / 5 = 20000; 10) Average salary of all employeesarrow_forward
- During the process of DBMS query optimisation, please describe how each of the eight cost estimation algorithms can be paired with a unique set of heuristic rules and how this affects the amount of work a DBA must perform.arrow_forwardDuring the process of DBMS query optimization, please explain how each of the eight cost estimation algorithms may be matched with a different set of heuristic rules and how this impacts the amount of work a DBA has to do.arrow_forwardExplain how each of the eight potential cost estimation strategies may be combined with different heuristic criteria when the DBMS is optimizing the query and how this affects the amount of work that the DBA must do.arrow_forward
- How may the DBA's workload change if the DBMS uses a number of heuristic rules and cost estimate methodologies to optimize queries?arrow_forwardNeed help with this: Answer each of the following questions using the KimTay Pet Supplies data shown in Figure 1-2. No computer work is required. 1. List the first and last names of all customers that have a credit limit above, but not including, $500. 2. List the invoice numbers for invoices placed by customer ID 435 on November 18, 2021. 3. List the item ID, item description, and on-hand value for each item in category HOR. (Hint: On-hand value is the result of multiplying the number of units on hand by the price.) 4. List the item ID and item description of all items that are in category DOG. 5. How many customers have a balance that exceeds their credit limit? 6. What is the item ID, description, and price of the least expensive item in the database? 7. For each invoice, list the invoice number, invoice date, customer ID, and customer first and last names. 8. For each invoice placed on November 16, 2021, list the invoice number, customer ID, and customer first and last names. 9.…arrow_forwardDuring the query optimization process that the DBMS does, please explain how each of the eight cost estimates algorithms may be combined with a variety of heuristic rules and how this impacts the amount of work that the DBA has to do.arrow_forward
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