/* company.sql Script to define and populate the example database COMPANY from C

Question

/*

company.sql

Script to define and populate the example database COMPANY from Chapter 3

of Elmasri and Navathe (pp.70-75 in the 6th edition), with some modifications

*/

-- drop tables

DROP TABLE EMPLOYEE CASCADE CONSTRAINTS;

DROP TABLE DEPARTMENT CASCADE CONSTRAINTS;

DROP TABLE DEPT_LOCATIONS CASCADE CONSTRAINTS;

DROP TABLE PROJECT CASCADE CONSTRAINTS;

DROP TABLE WORKS_ON CASCADE CONSTRAINTS;

DROP TABLE DEPENDENT CASCADE CONSTRAINTS;

-- create and populate tables

CREATE TABLE EMPLOYEE

(

Fname VARCHAR(20),

Minit CHAR(1),

Lname VARCHAR(20),

Ssn CHAR(9),

Bdate DATE,

Address VARCHAR(30),

Sex CHAR(1),

Salary NUMBER(5),

Super_Ssn CHAR(9),

Dno NUMBER(1),

PRIMARY KEY (Ssn),

FOREIGN KEY (Super_ssn)

REFERENCES EMPLOYEE (Ssn)

);

INSERT INTO EMPLOYEE VALUES ('James', 'E', 'Borg', '888665555', DATE '1937-11-10', '450 Stone, Houston, TX', 'M', 55000, NULL, 1);

INSERT INTO EMPLOYEE VALUES ('Jennifer', 'S', 'Wallace', '987654321', DATE '1941-06-20', '291 Berry, Bellaire, Tx', 'F', 37000, '888665555', 4);

INSERT INTO EMPLOYEE VALUES ('Franklin', 'T', 'Wong', '333445555', DATE '1955-12-08', '638 Voss, Houston, TX', 'M', 40000, '888665555', 5);

INSERT INTO EMPLOYEE VALUES ('John', 'B', 'Smith', '123456789', DATE '1965-01-09', '731 Fondren, Houston, TX', 'M', 30000, '333445555', 5);

INSERT INTO EMPLOYEE VALUES ('Alicia', 'J', 'Zelaya', '999887777', DATE '1968-01-19', '3321 castle, Spring, TX', 'F', 25000, '987654321', 4);

INSERT INTO EMPLOYEE VALUES ('Ramesh', 'K', 'Narayan', '666884444', DATE '1920-09-15', '975 Fire Oak, Humble, TX', 'M', 38000, '333445555', 5);

INSERT INTO EMPLOYEE VALUES ('Joyce', 'A', 'English', '453453453', DATE '1972-07-31', '5631 Rice, Houston, TX', 'F', 25000, '333445555', 5);

INSERT INTO EMPLOYEE VALUES ('Ahmad', 'V', 'Jabbar', '987987987', DATE '1969-03-29', '980 Dallas, Houston, TX', 'M', 22000, '987654321', 4);

INSERT INTO EMPLOYEE VALUES ('Melissa', 'M', 'Jones', '808080808', DATE '1970-07-10', '1001 Western, Houston, TX', 'F', 27500, '333445555', 5);

CREATE TABLE DEPARTMENT

(

Dname VARCHAR(20),

Dnumber NUMBER(1),

Mgr_ssn CHAR(9),

Mgr_start_date DATE,

PRIMARY KEY (Dnumber),

FOREIGN KEY (Mgr_ssn)

REFERENCES EMPLOYEE (Ssn)

);

INSERT INTO DEPARTMENT VALUES ('Research', 5, '333445555', DATE '1988-05-22');

INSERT INTO DEPARTMENT VALUES ('Administration', 4, '987654321', DATE '1995-01-01');

INSERT INTO DEPARTMENT VALUES ('Headquarters', 1, '888665555', DATE '1981-06-19');

-- this alter is needed to allow PROJECT and DEPARTMENT to reference each other

ALTER TABLE EMPLOYEE ADD FOREIGN KEY (Dno) REFERENCES DEPARTMENT (Dnumber);

CREATE TABLE DEPT_LOCATIONS

(

Dnumber NUMBER(1),

Dlocation VARCHAR(20),

PRIMARY KEY (Dnumber, Dlocation),

FOREIGN KEY (Dnumber)

REFERENCES DEPARTMENT (Dnumber)

);

INSERT INTO DEPT_LOCATIONS VALUES (1, 'Houston');

INSERT INTO DEPT_LOCATIONS VALUES (4, 'Stafford');

INSERT INTO DEPT_LOCATIONS VALUES (5, 'Bellaire');

INSERT INTO DEPT_LOCATIONS VALUES (5, 'Sugarland');

INSERT INTO DEPT_LOCATIONS VALUES (5, 'Austin');

CREATE TABLE PROJECT

(

Pname VARCHAR(20),

Pnumber NUMBER(2),

Plocation VARCHAR(20),

Dnum NUMBER(1),

PRIMARY KEY (Pnumber),

FOREIGN KEY (Dnum)

REFERENCES DEPARTMENT (Dnumber)

);

INSERT INTO PROJECT VALUES ('ProductX', 1, 'Bellaire', 5);

INSERT INTO PROJECT VALUES ('ProductY', 2, 'Sugarland', 5);

INSERT INTO PROJECT VALUES ('ProductZ', 3, 'Houston', 5);

INSERT INTO PROJECT VALUES ('Computerization', 10, 'Stafford', 4);

INSERT INTO PROJECT VALUES ('Reorganization', 20, 'Houston', 1);

INSERT INTO PROJECT VALUES ('Newbenefits', 30, 'Stafford', 4);

CREATE TABLE WORKS_ON

(

Essn CHAR(9),

Pno NUMBER(2),

Hours NUMBER(3,1),

PRIMARY KEY (Essn, Pno),

FOREIGN KEY (Essn)

REFERENCES EMPLOYEE (Ssn),

FOREIGN KEY (Pno)

REFERENCES PROJECT(Pnumber)

);

INSERT INTO WORKS_ON VALUES ('123456789', 1, 32.0);

INSERT INTO WORKS_ON VALUES ('123456789', 2, 8.0);

INSERT INTO WORKS_ON VALUES ('453453453', 1, 20.0);

INSERT INTO WORKS_ON VALUES ('453453453', 2, 20.0);

INSERT INTO WORKS_ON VALUES ('333445555', 1, 10.0);

INSERT INTO WORKS_ON VALUES ('333445555', 2, 10.0);

INSERT INTO WORKS_ON VALUES ('333445555', 3, 5.0);

INSERT INTO WORKS_ON VALUES ('333445555', 10, 10.0);

INSERT INTO WORKS_ON VALUES ('333445555', 20, 10.0);

INSERT INTO WORKS_ON VALUES ('333445555', 30, 5.0);

INSERT INTO WORKS_ON VALUES ('999887777', 30, 30.0);

INSERT INTO WORKS_ON VALUES ('999887777', 10, 10.0);

INSERT INTO WORKS_ON VALUES ('987987987', 10, 35.0);

INSERT INTO WORKS_ON VALUES ('987987987', 30, 5.0);

INSERT INTO WORKS_ON VALUES ('987654321', 30, 20.0);

INSERT INTO WORKS_ON VALUES ('987654321', 20, 15.0);

INSERT INTO WORKS_ON VALUES ('888665555', 20, 10.0);

CREATE TABLE DEPENDENT

(

Essn CHAR(9),

Dependent_name VARCHAR(20),

Sex CHAR(1),

Bdate DATE,

Relationship VARCHAR(10),

PRIMARY KEY (Essn, Dependent_name),

FOREIGN KEY (Essn)

REFERENCES EMPLOYEE (Ssn)

);

INSERT INTO DEPENDENT VALUES ('333445555', 'Alice', 'F', DATE '1986-04-05', 'Daughter');

INSERT INTO DEPENDENT VALUES ('333445555', 'Theodore', 'M', DATE '1983-10-25', 'Son');

INSERT INTO DEPENDENT VALUES ('333445555', 'Joy', 'F', DATE '1958-05-03', 'Spouse');

INSERT INTO DEPENDENT VALUES ('987654321', 'Abner', 'M', DATE '1988-01-04', 'Son');

INSERT INTO DEPENDENT VALUES ('987654321', 'Jennifer', 'F', DATE '1988-01-04', 'Daughter');

INSERT INTO DEPENDENT VALUES ('123456789', 'John', 'M', DATE '1988-02-28', 'Son');

INSERT INTO DEPENDENT VALUES ('123456789', 'Alice', 'F', DATE '1988-12-30', 'Daughter');

INSERT INTO DEPENDENT VALUES ('123456789', 'Elizabeth', 'F', DATE '1967-05-05', 'Spouse');

INSERT INTO DEPENDENT VALUES ('453453453', 'Joyce', 'F', DATE '1990-04-05', 'Daughter');

-- display contents of tables

SELECT * FROM EMPLOYEE;

SELECT * FROM DEPARTMENT;

SELECT * FROM DEPT_LOCATIONS;

SELECT * FROM PROJECT;

SELECT * FROM WORKS_ON;

SELECT * FROM DEPENDENT;

CSC 355 Database Systems

Fall Quarter 2018

Assignment 3 (9/19)

Due Sunday, September 30th @ 11:59pm.

Reading: Sections 4.3, 4.4, and 5.1 of Elmasri & Navathe 6th Edition. Chapters 2, 4, and 6 of Price's SQL book may be helpful as a reference, though they contain more material than we have covered. To find the Price book, you can search for “Oracle 12c” at library.depaul.edu (then you can choose “view ebook”)

For both Parts 1 and 2, please submit your SQL code. Submitting your output is optional.

First, download the script file company.sql from the course website and run it in SQLDeveloper to construct the example database illustrated in Chapter 3 of Elmasri & Navathe (pp.70-75). Inspect the schemas and tables in SQLDeveloper to make sure you understand the structure of the database. (Note that some changes have been made to the database state -- it differs somewhat from the state that is illustrated in Figure 3.6 on p.72.)

In a separate .sql file (do not modify company.sql), write a script that contains the following SQL queries. Add a comment before each query in your script file to label the queries 1 through 16 (e.g., the comment '-- 1.' on a line before the first query, the comment '-- 2.' on a line before the second query, etc).

(6 pts) Retrieve the names of all employees whose supervisor's supervisor has '888665555' for his/her Ssn.

(8 pts) Find the total number of employees and the total number of dependents for every department (the dependents for the department are the dependents of all employees working for that department).

(6 pts) Retrieve the names of employees whose salary is within $25,000 of the salary of the employee who is paid the most in the company (e.g., if the highest salary in the company is $85,000, retrieve the names of all employees that make at least $60,000. Note that you don’t have to worry about anyone making more than $85,000 because in this case $85,000 is the highest salary.).

(Extra Credit +8pts): Find the names and addresses of all employees whose departments have no location in Houston (that is, whose departments do not have a Dlocation of Houston) but who work on at least one project that is located in Houston (that is, who work on at least one project that has a Plocation of Houston). Note that the first condition is not equivalent to the employee's department having some Dlocation that is not in Houston -- the department must not have any Dlocation that is in Houston in order to be included in the result.

Explanation / Answer

1. SELECT Fname,LName FROM employee WHERE Super_Ssn IN (SELECT Ssn FROM employee WHERE Super_Ssn = '888665555')

2. SELECT employee.Dno, COUNT(employee.Ssn) AS 'Total Employees', COUNT(dependent.Essn) AS 'Total Dependants' FROM employee
LEFT JOIN
dependent ON dependent.Essn = employee.Ssn GROUP BY employee.Dno

3. SELECT Fname,Lname FROM employee WHERE Salary >= ((SELECT MAX(Salary) FROM employee) - 25000)

4. SELECT DISTINCT employee.Fname,employee.Lname,employee.Address FROM employee,dept_locations,works_on,project WHERE employee.Dno = dept_locations.Dnumber AND dept_locations.DLocation <> 'Houston' AND employee.Ssn = works_on.Essn AND works_on.Pno = project.Pnumber AND project.Plocation = 'Houston'

NOTE - For any more query, Pls use the comment section.

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