INFO 2312 Midterm 2

INFO 2312 – Midterm 2

Date: Jul 29

th

, 2021

Time: 2 Hours 45 Minutes Due: 06.45 PM

Marks: 30 Marks

• The exam is open book and slides.

• No copying code from the internet is allowed.

• Separate spaces provided for query and screenshots of the answer.

• Not all questions need screenshots. Only answer what is asked in the question.If you do not find the box to paste the screenshot, then it is not needed.

• For any clarification during the midterm, call, or text @ +1-236-795-9045.

This study source was downloaded by 100000840858457 from CourseHero.com on 07-07-2022 04:17:04 GMT -05:00 https://www.coursehero.com/file/103221113/INFO-2312-Summer-2021-Midterm-II-Romeo-Tarrayopdf/

Consider the tables below. The csv files are attached with the exam in Moodle. The blank spaces are null values.

Employee

empno ename job mgr hiredate sal comm deptno

7369 SMITH CLERK 7902 17-12-1980 800 20

7499 ALLEN SALESMAN 7698 20-02-1981 1600 300 30

7521 WARD SALESMAN 7698 22-02-1981 1250 500 30

7566 JONES MANAGER 7839 02-04-1981 2975 20

7654 MARTIN SALESMAN 7698 28-09-1981 1250 1400 30

7698 BLAKE MANAGER 7839 01-05-1981 2850 30

7782 CLARK MANAGER 7839 09-06-1981 2450 10

7788 SCOTT ANALYST 7566 09-12-1982 3000 20

7839 KING PRESIDENT 17-11-1981 5000 10

7844 TURNER SALESMAN 7698 08-09-1981 1500 0 30

7876 ADAMS CLERK 7788 12-01-1983 1100 20

7900 JAMES CLERK 7698 03-12-1981 950 30

7902 FORD ANALYST 7566 03-12-1981 3000 20

7934 MILLER CLERK 7782 23-01-1982 1300 10

Department

deptno dname loc

10 ACCOUNTING NEW YORK

20 RESEARCH DALLAS

30 SALES CHICAGO

40 OPERATIONS BOSTON

1.Create a new login group role ‘student’ with password ‘12345’, provide login access, database creation access and replication access. Then create a Database ‘midterm2’ and make ‘student’ as the owner of the database. The query can be generated by the GUI as shown in class to create group roles and databases. Past both queries below. [5 Marks] CREATE ROLE student WITH LOGIN

NOSUPERUSER

CREATEDB

NOCREATEROLE

INHERIT

REPLICATION

CONNECTION LIMIT -1

PASSWORD 'xxxxxx';

CREATE DATABASE midterm2 WITH OWNER = student

ENCODING = 'UTF8'

CONNECTION LIMIT = -1;

This study source was downloaded by 100000840858457 from CourseHero.com on 07-07-2022 04:17:04 GMT -05:00 https://www.coursehero.com/file/103221113/INFO-2312-Summer-2021-Midterm-II-Romeo-Tarrayopdf/

• Paste SQL query to CREATE TABLE ‘employee’ and ‘department’. Make sure to include foreign

key. No Screenshot need only queries for the CREATE Table.

Paste Query to Create Table ‘employee’ [3 Marks] CREATE TABLE employee ( empno INT PRIMARY KEY, ename VARCHAR (100), job TEXT, mgr INT, hiredate DATE, sal NUMERIC, comm INT, deptno INT ); Paste Query to Create Table ‘department’ [2 Marks] CREATE TABLE department ( deptno INT PRIMARY KEY, dname VARCHAR (100), loc VARCHAR(100) );

• Write SQL Query to copy the result of selecting all columns in the Left join between employee

and department into another table name ‘employeedetails’.

Write the Query below. [4 Marks]

SELECT employee.empno, employee.ename, employee.job, employee.mgr, employee.hiredate, employee.sal, employee.comm, employee.deptno, department.deptno, department.dname, department.loc FROM employee LEFT JOIN department ON employee.empno = department.deptno

Paste the Screenshot of Running a SELECT * FROM employeedetails (which was created above). [1 Marks] This study source was downloaded by 100000840858457 from CourseHero.com on 07-07-2022 04:17:04 GMT -05:00 https://www.coursehero.com/file/103221113/INFO-2312-Summer-2021-Midterm-II-Romeo-Tarrayopdf/

• Write SQL query to list the employees who are either ‘CLERK’ or ‘ANALYST’ in the Desc order.

Write the Query below. [1 Marks] SELECT employee.empno, employee.ename, employee.job, employee.mgr, employee.hiredate, employee.sal, employee.comm, employee.deptno, department.deptno, department.dname, department.loc FROM employee LEFT JOIN department ON employee.empno = department.deptno ORDER BY employee.job DESC; Paste the Screenshot of the output here. [1 Marks]

• Write a Query to add another column updatedsalary with data type REAL to the employee table.

After that write, another Update query to fill the updatedsalary column with value being sal*1.05 (which shows an increment of 5% in salary) + the comm earned. There are few comm values that are NULL. NULL values cannot be added to another data type (doing that will give you error). So, you must make use of a function COALESCE([NULL], [VALUE]). If the first input parameter to this function is a NULL value, then whatever value is provided in the second input parameter, that value will replace the NULL values. This way all values can be replaced by 0 instead of NULL values along with the UPDATE query.

Query to ADD Column Below [2 Marks] This study source was downloaded by 100000840858457 from CourseHero.com on 07-07-2022 04:17:04 GMT -05:00 https://www.coursehero.com/file/103221113/INFO-2312-Summer-2021-Midterm-II-Romeo-Tarrayopdf/