Database Systems: Design, Implementation, & Management
11th Edition
ISBN: 9781285196145
Author: Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Expert Solution & Answer
Chapter 7, Problem 7P
Explanation of Solution
ROLLBACK:
ROLLBACK is the SQL command that is used to undo all the changes performed in the last transaction. Syntax for ROLLBACK is given as follows.
BEGIN;
QUERY;
ROLLBACK;
SQL CODE:
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Please written by computer source
1. For this project, you need to create the company database and populate it with the data given in the Oracle SQL PLUS environment (if you have not done so) 2. Your SQL commands should be placed in file(s) and run from the file(s). 3. Implement Triggers on all the tables to change character data to uppercase in the character data type columns. 4. Implement a Function that returns Dname from Department for any give employee. The parameter to the function would be the SSN. 5. Implement a Function that returns manager’s full name for any given department. The parameter to the function would be the department name. 6. Implement another Function that returns manager’s full name for any given department. The parameter to the function would be the department number. 7. Implement a Procedure that increases an employee salary by x%. Employee is identified by SSN and the percentage of increase is given as an input. 8. Implement a Package that contains the…
THIS MODULE IS ABOUT SUBQUERIES, SO YOU MUST USE SUBQUERIES INSTEAD OF TABLE JOINS
(a) From which two fields in which table can you calculate the enrollment of a section?(b) From which table can you get both course and section numbers?(c) Which field in table SECTION uniquely identifies a section, section id or section no?(d) Write a SQL statement to show sections and their enrollment.(e) Write a SQL statement to show sections with enrollment greater than five. Display both course andsection numbers
A 'bank' table was built in SQL by Pooja. Later, she discovered that the table should have included one additional column. To add a new column to the table, what command should you use?
Chapter 7 Solutions
Database Systems: Design, Implementation, & Management
Ch. 7 - Prob. 1RQCh. 7 - Explain why the following command would create an...Ch. 7 - Prob. 3RQCh. 7 - Explain why it might be more appropriate to...Ch. 7 - What is the difference between a column constraint...Ch. 7 - What are referential constraint actions?Ch. 7 - Rewrite the following WHERE clause without the use...Ch. 7 - Explain the difference between an ORDER BY clause...Ch. 7 - Explain why the following two commands produce...Ch. 7 - What is the difference between the COUNT aggregate...
Ch. 7 - Prob. 11RQCh. 7 - Prob. 12RQCh. 7 - Write the SQL code that will create the table...Ch. 7 - Having created the table structure in Problem 1,...Ch. 7 - Prob. 3PCh. 7 - Prob. 4PCh. 7 - Write the SQL code to change the job code to 501...Ch. 7 - Write the SQL code to delete the row for William...Ch. 7 - Prob. 7PCh. 7 - Prob. 8PCh. 7 - Write the SQL code to change the EMP_PCT value to...Ch. 7 - Prob. 10PCh. 7 - Prob. 11PCh. 7 - Write the SQL code that will change the PROJ_NUM...Ch. 7 - Prob. 13PCh. 7 - Prob. 14PCh. 7 - Prob. 15PCh. 7 - Prob. 16PCh. 7 - Write the SQL code that will produce the same...Ch. 7 - Write the SQL code to find the average bonus...Ch. 7 - Prob. 19PCh. 7 - Prob. 20PCh. 7 - Write the SQL code to calculate the ASSIGN_CHARGE...Ch. 7 - Prob. 22PCh. 7 - Prob. 23PCh. 7 - Prob. 24PCh. 7 - Prob. 25PCh. 7 - Prob. 26PCh. 7 - Prob. 27PCh. 7 - Generate a listing of all purchases made by the...Ch. 7 - Using the output shown in Figure P7.29 as your...Ch. 7 - Prob. 30PCh. 7 - Prob. 31PCh. 7 - Use a query to compute the average purchase amount...Ch. 7 - Prob. 33PCh. 7 - Prob. 34PCh. 7 - Prob. 35PCh. 7 - Prob. 36PCh. 7 - Prob. 37PCh. 7 - Using the results of the query created in Problem...Ch. 7 - Create a query to find the balance characteristics...Ch. 7 - Prob. 40PCh. 7 - Prob. 41PCh. 7 - Prob. 42PCh. 7 - Prob. 43PCh. 7 - Prob. 44PCh. 7 - Prob. 45PCh. 7 - Prob. 46PCh. 7 - Prob. 47PCh. 7 - Prob. 48PCh. 7 - Prob. 49PCh. 7 - Prob. 50PCh. 7 - Prob. 51PCh. 7 - Prob. 52PCh. 7 - Prob. 53PCh. 7 - Prob. 54PCh. 7 - Prob. 55PCh. 7 - Prob. 56PCh. 7 - Prob. 57PCh. 7 - Prob. 58PCh. 7 - Prob. 59PCh. 7 - Prob. 60PCh. 7 - Prob. 61PCh. 7 - Prob. 62PCh. 7 - Prob. 63PCh. 7 - Write the SQL code to create the table structures...Ch. 7 - The following tables provide a very small portion...Ch. 7 - Prob. 67CCh. 7 - Prob. 68CCh. 7 - Prob. 69CCh. 7 - Prob. 70CCh. 7 - Prob. 71CCh. 7 - Prob. 72CCh. 7 - Prob. 73CCh. 7 - Prob. 74CCh. 7 - Prob. 75CCh. 7 - Prob. 76CCh. 7 - Prob. 77CCh. 7 - Prob. 78CCh. 7 - Prob. 79CCh. 7 - Prob. 80CCh. 7 - Prob. 81CCh. 7 - Prob. 82CCh. 7 - Prob. 83CCh. 7 - Prob. 84CCh. 7 - Prob. 85CCh. 7 - Prob. 86CCh. 7 - Prob. 87CCh. 7 - Prob. 88CCh. 7 - Prob. 89CCh. 7 - Prob. 90CCh. 7 - Prob. 91CCh. 7 - Prob. 92CCh. 7 - Prob. 93CCh. 7 - Prob. 94CCh. 7 - Prob. 95CCh. 7 - Prob. 96CCh. 7 - Prob. 97CCh. 7 - Write a query to display the movie number, movie...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- Write the SQL code that will restore the data to its original status: that is, the table should contain the data that existed before you made the changes in Problems 5 and 6.arrow_forwardWrite the SQL code that will produce the same information that was shown in Problem 2, but sorted by the employee’s last name. The results of running that query are shown in Figure P7.3.arrow_forwardUse FOR loop for your cursor. Write a PL/SQL block to read and display the department name and number of employees per department. Accept input from the user to get the number of employees he wants to see in the output. Display also the number of records returned by your PL/SQL block.arrow_forward
- Use FOR loop for your cursor. Write a PL/SQL block to read and display the job_id and number of employees per job_id. Accept input from the user to get the number of employees he wants to see in the output. Display also the number of records returned by your PL/SQL block.arrow_forwardInstructions Write SQL queries to solve the following problems. We will be using the “university” database. All queries should involve only the instructor table. After you are done, save your work as .sql file and turn in the .sql file into Moodle for grading. Write a SQL statement to display all columns using the SQL asterisk (*) wild-card character. Write a SQL statement to display ID and name of the instructors (ID appears first). Write a SQL statement to display department names. Write a SQL statement to display unique department names. (expect 7 rows returned) Write a SQL statement to display all info about instructors having a salary greater than 75000. (expect 6 rows returned) Write a SQL statement to display department name, instructor name, and salary for instructors that have a salary less than 70000. Sort the results in ascending order by department name. (expect 4 rows returned) Write a SQL statement to display name, department name, and salary for instructors that have a…arrow_forwardI am trying to get rid of duplicate rows in SQL. This is the current code I'm using. Please help me to write a code to create a new table without the duplicates. Select EmployeeID, Username, FirstName, LastName, RoleName, RoleDescription, Count(*) as '# of Duplicates' From [dbo].[vw_MyAccessInfo] Group by EmployeeID, Username, FirstName, LastName, RoleName,RoleDescription Having Count(*) > 1 Select * from [dbo].[vw_MyAccessInfo] Select distinct * from [dbo].[vw_MyAccessInfo]arrow_forward
- Views in SQL are kind of virtual tables. A view also has rows and columns as they are in a real table in the database. We can create a view by selecting fields from one or more tables present in the database. A View can either have all the rows of a table or specific rows based on certain conditions. Under what circumstances would you create a View?arrow_forwardThisarrow_forwardProblem: Having created the table structure in Problem 1, write the SQL code to enter the first two rows for the table shown in Figure P8.2. Each row should be inserted individually, without using a subquery. Insert the rows in the order that they are listed in the figure.I gor an error: RROR 1062 (23000) at line 1: Duplicate entry '101' for key 'PRIMARY' when I used this script below, I got an error. see image.ERROR 1062 (23000) at line 1: Duplicate entry '101' for key 'PRIMARY' INSERT INTO EMP_1 VALUES ('101','News','John','G','2000-11-08','502');INSERT INTO EMP_1 VALUES ('102','Senior','David','H','1989-07-12','501');arrow_forward
- In the SQL Oracle Application Write one query to return the employee_id, job_id, hire_date, and department_id of all employees and a second query listing employee_id, job_id, start_date, and department_id from the job_history table and combine the results as one single output. Make sure you suppress duplicates in the output.arrow_forwardCreate a Trigger in SQL that updates an existing View when a new entire is made to the Doctors table.arrow_forwardThe given SQL creates a Song table and inserts three songs. Write three UPDATE statements to make the following changes: Change the title from 'One' to 'With Or Without You'. Change the artist from 'The Righteous Brothers' to 'Aretha Franklin'. Change the release years of all songs after 1990 to 2021. Run your solution and verify the songs in the result table reflect the changes above.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781305627482Author:Carlos Coronel, Steven MorrisPublisher:Cengage Learning
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781285196145Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos CoronelPublisher:Cengage Learning
A Guide to SQLComputer ScienceISBN:9781111527273Author:Philip J. PrattPublisher:Course Technology Ptr
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781305627482
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781285196145
Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher:Cengage Learning
A Guide to SQL
Computer Science
ISBN:9781111527273
Author:Philip J. Pratt
Publisher:Course Technology Ptr
SQL Basics for Beginners | Learn SQL | SQL Tutorial for Beginners | Edureka; Author: edureka;https://www.youtube.com/watch?v=zbMHLJ0dY4w;License: Standard YouTube License, CC-BY