Modern Database Management (12th Edition)
12th Edition
ISBN: 9780133544619
Author: Jeffrey A. Hoffer, Ramesh Venkataraman, Heikki Topi
Publisher: PEARSON
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Chapter 7, Problem 7.57PAE
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To list:
SQL query for the customer name, and number of vendors in the same state.
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The production manager at PVFC is concerned about support for purchased parts in products owned by customers. A simple analysis he wants done is to determine for each customer how many vendors are in the same state as that customer. Develop a list of all the PVFC customers by name with the number of vendors in the same state as that customer. (Label this computed result NumVendors.)
Belowis a sample data for Parts and for Vendors who supply those parts. Indiscussing these data with users, we find that part numbers (but not description)uniquely identify parts and that vendor names uniquely identify vendors.Part_No Description Vendor_Name Address Unit_Cost1234 Logic Chip Fast Chips Kumasi 10.00 Smart Chips Accra 8.005678 Memory Chip Fast Chips Kumasi 3.00 Quality Chips Obuasi 2.00 Smart Chips Accra 5.00
b) List the functional dependencies in PARTSUPPLIER and identify acandidate key.c) Develop a set of 3NF relations from PART SUPPLIER
A table called "game1" contains three columns and twenty rows, but "game2" has the same column as game1 (ie 3) and fifteen rows. Both tables have 5 rows in common. What is the degree and cardinality of the resulting table if we take union?
Chapter 7 Solutions
Modern Database Management (12th Edition)
Ch. 7 - Prob. 7.1RQCh. 7 - Prob. 7.2RQCh. 7 - Prob. 7.3RQCh. 7 - Prob. 7.4RQCh. 7 - Prob. 7.5RQCh. 7 - Explain the relationship between EXISTS and...Ch. 7 - Prob. 7.7RQCh. 7 - Prob. 7.8RQCh. 7 - Prob. 7.9RQCh. 7 - Prob. 7.10RQ
Ch. 7 - Under what conditions can a UNION clause be used?Ch. 7 - Prob. 7.12RQCh. 7 - Prob. 7.13RQCh. 7 - List for advantages of SQL-invoked routines.Ch. 7 - Prob. 7.15RQCh. 7 - Prob. 7.16RQCh. 7 - Prob. 7.17RQCh. 7 - Prob. 7.18RQCh. 7 - Prob. 7.19RQCh. 7 - Prob. 7.20RQCh. 7 - Prob. 7.21RQCh. 7 - Prob. 7.22RQCh. 7 - Prob. 7.23RQCh. 7 - This chapter discusses the data dictionary views...Ch. 7 - Prob. 7.25PAECh. 7 - Prob. 7.26PAECh. 7 - Prob. 7.27PAECh. 7 - Are based on the class schedule 3NF relations...Ch. 7 - Prob. 7.29PAECh. 7 - Prob. 7.30PAECh. 7 - Prob. 7.31PAECh. 7 - Are based on Figure 7-17. This problem set...Ch. 7 - Prob. 7.33PAECh. 7 - Prob. 7.34PAECh. 7 - Prob. 7.35PAECh. 7 - Prob. 7.36PAECh. 7 - Prob. 7.37PAECh. 7 - Prob. 7.38PAECh. 7 - Prob. 7.39PAECh. 7 - Prob. 7.40PAECh. 7 - Prob. 7.41PAECh. 7 - Prob. 7.42PAECh. 7 - Prob. 7.43PAECh. 7 - Prob. 7.44PAECh. 7 - Write an SQL query to display the order number,...Ch. 7 - Prob. 7.46PAECh. 7 - Prob. 7.47PAECh. 7 - Prob. 7.48PAECh. 7 - Prob. 7.49PAECh. 7 - Prob. 7.50PAECh. 7 - Write an SQL query to list each customer who...Ch. 7 - Prob. 7.52PAECh. 7 - Modify Problem and Exercise 6-60 so that the list...Ch. 7 - Prob. 7.54PAECh. 7 - Prob. 7.55PAECh. 7 - Prob. 7.56PAECh. 7 - Prob. 7.57PAECh. 7 - Prob. 7.58PAECh. 7 - Prob. 7.59PAECh. 7 - Prob. 7.60PAECh. 7 - Prob. 7.61PAECh. 7 - Prob. 7.62PAECh. 7 - Prob. 7.63PAECh. 7 - Rewrite your answer to Problem and Exercise 6-71...Ch. 7 - Display the customer ID, name, and order ID for...Ch. 7 - Prob. 7.66PAECh. 7 - Prob. 7.67PAECh. 7 - Prob. 7.68PAECh. 7 - Prob. 7.69PAECh. 7 - Prob. 7.70PAECh. 7 - Prob. 7.71PAECh. 7 - Write an SQL query to list the order number,...Ch. 7 - Prob. 7.73PAECh. 7 - Prob. 7.74PAECh. 7 - Prob. 7.75PAECh. 7 - Prob. 7.76PAE
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- How do you balance the trade-off between indexing for query performance and the overhead of maintaining those indexes?arrow_forwardafter revisiting the last table, which taks should we assign to John?arrow_forwardGiven the following relation that stores details of student registration: Stu_ID Name Town Province Course RegisteredDate S101 Malak Al Nadabi Al Khuwair Western ITDR2106 02-02-2020 S101 Malak Al Nadabi Al Khuwair Western ITDR1105 14-09-2019 S102 Nadar Al Hashli Daesit Southern ITDR1102 05-02-2020 S102 Nadar Al Hashli Daesit Southern ITDR1101 05-02-2020 S103 Basit Barkat Ruwi Central ITDR1105 06-02-2020 S104 Yeshan Al Khuwair Western ITDR2106 15-09-2019 If the functional dependencies are consistent with the above relation, put TRUE. If they are not, put FALSE. Stu_ID à Name, Town Town à Province Course à RegisteredDate RegisteredDate à Course Stu_ID, Course à RegisteredDate Stu_ID à Course Stu_IDarrow_forward
- Examine the data in the Veterinary Office List-Version One in Figure 1-34 (see page 63), and state assumptions about functional dependencies in that table. What is the danger of making such conclusions on the basis of sample data?arrow_forwardBriefly explain Global Descriptor Table (GDT)arrow_forwarda: Draw relational model b: Normalize upto 3NFarrow_forward
- How does a "self-referencing table" work, and in what scenarios is it commonly used?arrow_forwardIf every student at a school is assigned a 4-digit person ID number, but 0 and 1 are not used in ID numbers and the numbers 8 and 9 are reserved for faculty, how many potential student ID numbers are there?arrow_forwardThe meaning of the word "transitive" We know that tables in second normal form can be changed to tables in third normal form, but what is the rule for making this transformation?arrow_forward
- What exactly does it imply to say that something is transitive? It is possible to convert tables that are in the second normal form to tables that are in the third normal form; however, the rule for doing so is not well known.arrow_forwardUse the following ERD to answer the next 2 questions: What is the primary key of the WorkHours table? Indicate the redundant field in the Employees table.arrow_forwardThe following INSTRUCTOR relation shows the information of instructors and the training sessions they offer. Each instructor can give any session at a chosen date. Why INSTRUCTOR relation is not in 2NF? How can you convert it be in 2NF? Instructor_ID InstructorName SessionID Session_Date 1 Ahmad S1 June 1st 1 Ahmad S2 July 1st 2 Ali S2 June 1st 3 Mohammad S3 August 15tharrow_forward
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