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
Expert Solution & Answer
Chapter 8, Problem 10RQ
Explanation of Solution
Difference between UNION and UNION ALL:
UNION | UNION ALL |
The UNION set operator is used to combine the output of two or more than two queries and produce a result. The produced result contains unique values. | The UNION ALL set operator is used to combine the output of two or more than two queries and produce a result. The produced result contains duplicate values. |
Syntax: QUERY UNION QUERY; | Syntax: QUERY UNION ALL QUERY; |
Example for UNION:
Consider two tables,
The table “T1(ID, fruit_name)” contains rows with values (1, 'Mango' ), (1, 'Orange' ), (3, 'Grapes' ).
The table “T2(ID, fruit_name)” contains rows with values (1, 'Mango' ), (1, 'Apple' ), (3, 'Grapes' )...
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
What is the difference between union and union all operators?
Give two examples of jQuery syntax in your notes.
Include at least two working examples of each piece of jQuery syntax in your notes.
Chapter 8 Solutions
Database Systems: Design, Implementation, & Management
Ch. 8 - What is a cross join? Give an example of its...Ch. 8 - What three join types are included in the outer...Ch. 8 - Using tables named T1 and T2, write a query...Ch. 8 - Prob. 4RQCh. 8 - Prob. 5RQCh. 8 - Prob. 6RQCh. 8 - Prob. 7RQCh. 8 - What does it mean to say that SQL operators are...Ch. 8 - Prob. 9RQCh. 8 - Prob. 10RQ
Ch. 8 - Prob. 11RQCh. 8 - Prob. 12RQCh. 8 - Prob. 13RQCh. 8 - Given the employee information in Question 11,...Ch. 8 - Prob. 15RQCh. 8 - Prob. 16RQCh. 8 - Prob. 17RQCh. 8 - Prob. 18RQCh. 8 - What string function should you use to list the...Ch. 8 - Prob. 20RQCh. 8 - Prob. 21RQCh. 8 - Prob. 22RQCh. 8 - Prob. 23RQCh. 8 - Prob. 24RQCh. 8 - Prob. 1PCh. 8 - Insert the data into the tables you created in...Ch. 8 - Prob. 3PCh. 8 - Prob. 4PCh. 8 - Prob. 5PCh. 8 - Prob. 6PCh. 8 - Prob. 7PCh. 8 - Prob. 8PCh. 8 - Prob. 9PCh. 8 - Modify the CUSTOMER table to include two new...Ch. 8 - Prob. 11PCh. 8 - Prob. 12PCh. 8 - Prob. 13PCh. 8 - Prob. 14PCh. 8 - Prob. 15PCh. 8 - Prob. 16PCh. 8 - Write a trigger to update the customer balance...Ch. 8 - Write a procedure to delete an invoice, giving the...Ch. 8 - Prob. 19PCh. 8 - Prob. 20PCh. 8 - Prob. 21PCh. 8 - Prob. 22PCh. 8 - Prob. 23PCh. 8 - Prob. 24PCh. 8 - Prob. 25PCh. 8 - Prob. 26PCh. 8 - Prob. 27PCh. 8 - Create a trigger named trg_line_total to write the...Ch. 8 - Create a trigger named trg_line_prod that...Ch. 8 - Create a stored procedure named prc_inv_amounts to...Ch. 8 - Create a procedure named prc_cus_balance_update...Ch. 8 - Modify the MODEL table to add the attribute and...Ch. 8 - Prob. 33PCh. 8 - Modify the CHARTER table to add the attributes...Ch. 8 - Write the sequence of commands required to update...Ch. 8 - Write the sequence of commands required to update...Ch. 8 - Write the command required to update the...Ch. 8 - Write the command required to update the...Ch. 8 - Write the command required to update the...Ch. 8 - Prob. 40PCh. 8 - Create a trigger named trg_char_hours that...Ch. 8 - Create a trigger named trg_pic_hours that...Ch. 8 - Create a trigger named trg_cust_balance that...Ch. 8 - Alter the DETAILRENTAL table to include a derived...Ch. 8 - Alter the VIDEO table to include an attribute...Ch. 8 - Update the VID_STATUS attribute of the VIDEO table...Ch. 8 - Alter the PRICE table to include an attribute...Ch. 8 - Prob. 48CCh. 8 - Prob. 51C
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
- Question 41: Match each reference or formula to its best description. =$A$6 =$B7 =SUM(AVERAGE(A1:!6), B7) Absolute cell references Mixed cell reference Nested functionarrow_forwardPlease offer explicit examples of how calls and returns work into the overall structure.?arrow_forwardWhat’s the difference between the UNION and UNION ALL set operators?arrow_forward
- Execute the following statements using MYSQL: 1.Create a Trigger "trigger regno" for the salesman table (Before INSERT) set the value as O for the experience > 7 and evaluate it. Also write the syntax to drop the Trigger "trigger regno* 2. Insert a value for Customer table (#Last 3 digit of your register no, #Your name, Vellore, 55, 010). Insert a value for salesman table ("10", #Your name, 5, 4000). 3. List out the number of customers in each city by arranging them from low to high. ( 4. Select all the salesman who's work experience is between 4 and 8.arrow_forwardHow do you use the LEAD and LAG functions, and what are their primary purposes?arrow_forwardIn EXCEPT (MINUS) queries, the order of operands matters, but in UNION queries, it doesn't?arrow_forward
- How is an ADT put together, exactly? Indicate your answer where indicated.arrow_forwardWhich of the following is not a valid SELECT statement?a. SELECT STDDEV(retail)FROM books;b. SELECT AVG(SUM(retail))FROM ordersNATURAL JOIN orderitems NATURAL JOIN booksGROUP BY customer#;c. SELECT order#, TO_CHAR(SUM(retail), '999.99')FROM orderitems JOIN books USING(isbn)GROUP BY order#;d. SELECT title, VARIANCE(retail-cost)FROM booksGROUP BY pubid;arrow_forwardI cannot figure out this problem/question. Can someone help me solve this? I must use use postgreSQL to answer the question. For this problem create a table called instructor_course_nums. Write a procedure that accepts an instructor ID as input. The procedure calculates the total number of course sections taught by that instructor, and adds a tuple to the instructor_course_nums table consisting of the instructors ID number, name, and total courses taught - call these attributes: ID, name, and tot_courses. If the instructor already has an entry in the table, then the procedure makes sure the total number of courses taught in the instructor_course_nums table is up-to-date. You must name your procedure:<LastName>_<DOB_DayOfMonth>_insCourseNumsProcWhere <LastName> is your last name and <DOB_DayOfMonth> is the day of the monthyou were born. Below is an example of how I named my procedure:Morabito_05__insCourseNumsProcarrow_forward
- Please explain me about these by using key design half - subtractor by using key design full-subtractor.arrow_forwardQuestion 3 Below code intends to use a variable grade to store a set of grades. Explain what is the syntax error and how to get it fixed. Only one line of code can be changed with other lines still being used. grade = (90,) grade.append(80) grade.append(70) grade.append(85) # syntax error: # how to fix: What sequence type you should use to create a look-up table between the following departments and colleges? The science college has departments of geo, bio; the Arts college has departments of anth, history. Complete the code so that the code will print out the college where the geo department is in. #Sequence type: dept2col= "geo":"science", "bio":"science", "anth":"Arts", "history":"Arts" print dept2col Which of the following statements are correct? O ArcPy data access module has been avaíable since ArcGIS 10.1 O ArcPy data access module has been avaiable since ArcGIS 10.o. O ArcPy data access module offers a cursor with faster access to data. O The cursor in data access module is the…arrow_forwardHow do you write Relational Operators (>=, <=, <, >, <>) queries in Microsoft Access?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 LearningDatabase 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
- Np Ms Office 365/Excel 2016 I NtermedComputer ScienceISBN:9781337508841Author:CareyPublisher:Cengage
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
Np Ms Office 365/Excel 2016 I Ntermed
Computer Science
ISBN:9781337508841
Author:Carey
Publisher:Cengage