Database Systems: Design, Implementation, Management, Loose-leaf Version
12th Edition
ISBN: 9781305866799
Author: Coronel, Carlos; Morris, Steven
Publisher: Course Technology
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Chapter 3, Problem 13RQ
Use Figure Q3.13 to answer Questions 13–17.
FIGURE Q3.13 THE CH03_VENDINGCO
Write the relational algebra formula to apply a UNION relational operator to the tables shown in Figure Q3.13.
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Chapter 3 Solutions
Database Systems: Design, Implementation, Management, Loose-leaf Version
Ch. 3 - What is the difference between a database and a...Ch. 3 - Prob. 2RQCh. 3 - Prob. 3RQCh. 3 - What are the requirements that two relations must...Ch. 3 - Which relational algebra operators can be applied...Ch. 3 - Explain why the data dictionary is sometimes...Ch. 3 - A database user manually notes that The file...Ch. 3 - Prob. 8RQCh. 3 - Prob. 9RQCh. 3 - Prob. 10RQ
Ch. 3 - Prob. 11RQCh. 3 - Prob. 12RQCh. 3 - Use Figure Q3.13 to answer Questions 1317. FIGURE...Ch. 3 - Create the table that results from applying a...Ch. 3 - Write the relational algebra formula to apply an...Ch. 3 - Create the table that results from applying an...Ch. 3 - Using the tables in Figure Q3.13, create the table...Ch. 3 - Prob. 18RQCh. 3 - Prob. 19RQCh. 3 - Prob. 20RQCh. 3 - Identify and describe the components of the table...Ch. 3 - Identify the primary keys. FIGURE Q3.22 THE...Ch. 3 - Identify the foreign keys. FIGURE Q3.22 THE...Ch. 3 - Create the ERM. FIGURE Q3.22 THE CH03_THEATER...Ch. 3 - Create the relational diagram to show the...Ch. 3 - Prob. 26RQCh. 3 - What would be the conceptual view of the INDEX...Ch. 3 - Prob. 1PCh. 3 - Prob. 2PCh. 3 - Do the tables exhibit referential integrity?...Ch. 3 - Describe the type(s) of relationship(s) between...Ch. 3 - Prob. 5PCh. 3 - Prob. 6PCh. 3 - Prob. 7PCh. 3 - Prob. 8PCh. 3 - Create the relational diagram to show the...Ch. 3 - Prob. 10PCh. 3 - Prob. 11PCh. 3 - Create the relational diagram to show the...Ch. 3 - Prob. 13PCh. 3 - Do the tables exhibit referential integrity?...Ch. 3 - Prob. 15PCh. 3 - Prob. 16PCh. 3 - For each table, identify the primary key and the...Ch. 3 - Prob. 18PCh. 3 - Do the tables exhibit referential integrity?...Ch. 3 - Identify the TRUCK tables candidate key(s). FIGURE...Ch. 3 - For each table, identify a superkey and a...Ch. 3 - Prob. 22PCh. 3 - Prob. 23PCh. 3 - Prob. 24PCh. 3 - Create the ERD. (Hint: Look at the table contents....Ch. 3 - Prob. 26PCh. 3 - Prob. 27PCh. 3 - Prob. 28PCh. 3 - Create the table that would result from applying...Ch. 3 - Create the table that would result from applying...Ch. 3 - Create the table that would result from applying a...
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- Using the tables in Figure Q3.13, create the table that results from MACHINE DIFFERENCE BOOTH. FIGURE Q3.13 THE CH03_VENDINGCO DATABASE TABLESarrow_forwardCreate the table that results from applying an INTERSECT relational operator to the tables shown in Figure Q3.13. FIGURE Q3.13 THE CH03_VENDINGCO DATABASE TABLESarrow_forwardProblems 2932 are based on the following query: SELECT CUS_CODE, MAX(LINE_UNITSLINE_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?arrow_forward
- Write the SQL code that will change the PROJ_NUM to 14 for employees who were hired before January 1, 1994, and whose job code is at least 501. (You may assume that the table will be restored to its condition preceding this question.)arrow_forwardProblems 25 and 26 are based on the following query: SELECT P_CODE, P_DESCRIPT, P_QOH, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE = '21344' ORDER BY P_CODE; How should you rewrite the query to ensure that it uses the index you created in your solution to Problem 25?arrow_forwardProblem 1 and 2 are based on the following query: SELECT EMP_LNAME, EMP_FNAME, EMP_AREACODE, EMP_SEX FROM EMPLOYEE WHERE EMP_SEX = 'F' AND EMP_AREACODE = '615' ORDER BY EMP_LNAME, EMP_FNAME; What indexes should you create? Write the required SQL commands.arrow_forward
- Use your ERD to define the table structures in the database using SQL DDL commands to build your schema.arrow_forwardPlease help with the following: Write following SQL Queries:A simple database composed of the following tables: PATIENT, DOCTOR, DRUG, and PRESCRIPTION, List all the rows in which the prescription dates occur on or after November 14. How many doctors provide prescriptions with 30 tablets in total? List doctor’s details where speciality is either Dermatology or Neurology. (Use INoperator). List the results by the first name in ascending order and the last name indescending order Find all patients rows whose first names include ‘George’ (Assume case sensitivity). List number of patients that do not have a phone number. How many drugs with price < 40$? How many prescriptions are generated for each patient, limit the listing to patients who have more than 2 prescriptions? List the drug codes and prices (rounded to one decimal place). How many doctors prescribe the drug code KO15? List all drugs with their expiration date (one year from the date of manufacturer)…arrow_forwardUsing the EMPLOYEE, JOB, and PROJECT tables in the Ch07_ConstructCo database, write the SQL code that will join the JOB, EMPLOYEE, and PROJECT tables using common attributes. Display the attributes shown in the results presented in Figure P7.2, sorted by project value.arrow_forward
- Write the relational algebra formula to apply a UNION relational operator to the tables shown in Figure Q3.13.arrow_forwardPlease insert the data into the database tablesarrow_forwardQUESTION 16 Consider the following Grades table and express in Relational Algebra each of the questions below: Grades StudentId CourseCode Semester Grade 1001 ITDR3101 FL20 B 1002 ITSW3104 FL20 A 1003 ITGP4101 SP20 A 1001 ITDR2106 SP21 C a. List the grades of students who studied the course having the code "ITDR2106* in the semester "FL20".] b. List the details of students who didn't get the grade 'A'’ in any course. c. List the ids students who got the grade B' in SP20° semester. С.arrow_forward
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