Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Find the numbers that has not been used as DEPTNO in the DEPT table.
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- Which of these is more important, Primary Key or Unique? In the JustLee Books database, you may look up the tablesarrow_forwardYou will be using the Colonial Adventure Tours database. List the trip IDs and trip names for each pair of trips that have the same start location.(You will need to assign an alias). The first trip id should be the major sort key, and the second trip id should be the minor sort key.arrow_forwardThe order of operands is significant in EXCEPT (MINUS) queries but is irrelevant in UNION queries?arrow_forward
- Below are some rows of the PROVIDERS table for a factory: PCODE 10192 98411 0489035 NAME Hans, Inc. Tools and More Motors Inc. PHONE 231 - 3092 231-1029 993 - 1821 All providers from the factory zone of the city start with 231. You want to get the providers that are in the factory zone of the city. Which of the following is more appropriate? O a. O b. SELECT * FROM PROVIDERS WHERE PHONE LIKE '% 231' O C. O d. SELECT * FROM PROVIDERS WHERE PHONE LIKE $231%' SELECT * FROM PROVIDERS WHERE PHONE LIKE 231 SELECT * FROM PROVIDERS WHERE PHONE LIKE '%231%'arrow_forwardTrigger pleasearrow_forwardList the names of all Staff members who hold a faculty position and have a salary of $45,000 or less. Show their names as their first name, followed by a space, and then their last name but sort the list alphabetically by last name and then first name. Hint: Check out the Position column in the Staff table. All staff members who do not hold a faculty position will get a bonus this year equal to 5% of their salary. List the names, current salary, and bonus amount for each Staff member (non-faculty) who is due a bonus. Show your list in order with the person receiving the highest bonus first.arrow_forward
- If the DOCTORS table has the following columns, and you want to write a SELECT statement to return the Doctors name and join_year who were joined before 2000, and after 2018. Column Name Data type Size Doctor_id Number Doctor_name Varchar2 30 Degree Varchar2 25 Join_year Number 4 Salary Number which of the following SQL statements should you use?arrow_forwardHow can we check if a table has minimum redundency?A) There is no way to checkB) See if a table has any primary values duplicated somewhere elseC) Use a normal form to checkD) See if a table has a lot of null valuesarrow_forwardSome rows of the STUDENT table are shown below: CODE NAME GPA YEAR 291 ALEX 3.1 2 938 MICHELE 2.3 1 931 JHON 3.3 1 182 JOE 3.4 2 190 REY 2.0 2 330 RON 3.9 3 Which best describes the result of the query below? SELECT YEAR, AVG(GPA) FROM STUDENT WHERE GPA > 2.0 GROUP BY YEAR a. The average maximum GPA of all the students in each year. b. The year of the student with the maximum GPA. c. The average GPA of students with a GPA higher than 2.0 each year. d. The average GPA of the students with a GPA higher than 2.0.arrow_forward
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