CREATE TABLE Students ( student_id int, ); student_name varchar (50) NOT NULL, gender char (1) NULL, age float NULL, ); EMail varchar(40) NULL, EntryDate date NULL CREATE TABLE Professors ( prof_id int, prof_name varchar (50) NOT NULL dept varchar(5) NULL, officephone varchar(16) NULL EMail varchar(40) NULL webAddress varchar(40) NULL I I I

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Report the names of the professors who work on the most number of projects 

Insert Into Professors Values (2005, "Charlie", 'CIS', "201-234-3291",
"Charlie@calstatela.edu",
"www.calstatela.edu/faculty/Charlie/");
Insert Into Professors Values (2006, "Jennifer", 'CIS', "201-234-3621",
"Jennifer@calstatela.edu", "www.calstatela.edu/faculty/Jennifer/");
Insert Into Professors Values (2007, "Jason", 'CIS', "201-234-3921",
"www.calstatela.edu/faculty/Jason/");
"Jason@calstatela.edu",
Insert Into Supervise Values (2001, 0001, "project01", "2002-02-01");
Insert Into Supervise Values (2001, 0002, "project01", "2002-03-01");
Insert Into Supervise Values (2001, 0003, "project02", "2002-03-01");
Insert Into Supervise Values (2002, 0005, "project03", "2002-09-01");
Insert Into Supervise Values (2002, 0006, "project04", "2005-11-01");
Insert Into Supervise Values (2003, 0004, "project05","2003-10-01");
Insert Into Supervise Values (2003, 0004, "project06", "2004-10-01");
Transcribed Image Text:Insert Into Professors Values (2005, "Charlie", 'CIS', "201-234-3291", "Charlie@calstatela.edu", "www.calstatela.edu/faculty/Charlie/"); Insert Into Professors Values (2006, "Jennifer", 'CIS', "201-234-3621", "Jennifer@calstatela.edu", "www.calstatela.edu/faculty/Jennifer/"); Insert Into Professors Values (2007, "Jason", 'CIS', "201-234-3921", "www.calstatela.edu/faculty/Jason/"); "Jason@calstatela.edu", Insert Into Supervise Values (2001, 0001, "project01", "2002-02-01"); Insert Into Supervise Values (2001, 0002, "project01", "2002-03-01"); Insert Into Supervise Values (2001, 0003, "project02", "2002-03-01"); Insert Into Supervise Values (2002, 0005, "project03", "2002-09-01"); Insert Into Supervise Values (2002, 0006, "project04", "2005-11-01"); Insert Into Supervise Values (2003, 0004, "project05","2003-10-01"); Insert Into Supervise Values (2003, 0004, "project06", "2004-10-01");
CREATE TABLE Students (
student_id int,
);
student_name varchar (50) NOT NULL,
gender char(1)
NULL,
age float NULL,
EMail varchar(40) NULL,
EntryDate date NULL
CREATE TABLE Professors (
prof_id int,
);
prof_name varchar (50) NOT NULL,
dept varchar(5) NULL,
officephone varchar(16) NULL,
EMail varchar(40) NULL,
webAddress varchar(40) NULL
);
CREATE TABLE Supervise (
prof_id int,
student_id int,
project varchar(10) NULL,
startdate date NULL
Insert Into Students Values (0001,
Insert Into Students Values (0002,
01");
Insert Into Students Values (0003,
Insert Into Students Values (0004,
03-01");
Insert Into Students Values (0005,
Insert Into Students Values (0006,
"2004-01-01");
"Tom", 'M', 19, "tom@yahoo.com", "2001-01-01");
"John", 'M', 20, "John@hotmail.com", "2001-06-
"Anmy", 'F', 15, "Anmy@gmail.com", "2003-01-01");
"Dustin", 'M', 24, "Dustin@hotmail.com", "2002-
"Mary", 'F', 22, "Mary@sbc.net", "2004-01-030");
"Jessica", 'F', 21, "Jessica@calstatela.edu",
"Rainy", 'M', 19, "rainy@calstatela.edu", "2004-
Insert Into Students Values (0007,
01-12");
Insert Into Students Values (0008, "Kelvin", 'M', 19, "Kelvin@calstatela.edu",
"2004-01-12");
Insert Into Professors Values(2001, "Scott", 'CS', "201-234-3213",
"scott@calstatela.edu", "www.calstatela.edu/faculty/scott/");
Insert Into Professors Values (2002, "David", 'CE', "201-234-3112",
"david@calstatela.edu", "www.calstatela.edu/faculty/david/");
Insert Into Professors Values (2003, "Judy", 'CE', "201-234-3002",
"Judy@calstatela.edu", "www.calstatela.edu/faculty/Judy/");
Insert Into Professors Values (2004, "Gerald", 'CS', "201-234-3102",
"Gerald@calstatela.edu", "www.calstatela.edu/faculty/Gerald/");
Transcribed Image Text:CREATE TABLE Students ( student_id int, ); student_name varchar (50) NOT NULL, gender char(1) NULL, age float NULL, EMail varchar(40) NULL, EntryDate date NULL CREATE TABLE Professors ( prof_id int, ); prof_name varchar (50) NOT NULL, dept varchar(5) NULL, officephone varchar(16) NULL, EMail varchar(40) NULL, webAddress varchar(40) NULL ); CREATE TABLE Supervise ( prof_id int, student_id int, project varchar(10) NULL, startdate date NULL Insert Into Students Values (0001, Insert Into Students Values (0002, 01"); Insert Into Students Values (0003, Insert Into Students Values (0004, 03-01"); Insert Into Students Values (0005, Insert Into Students Values (0006, "2004-01-01"); "Tom", 'M', 19, "tom@yahoo.com", "2001-01-01"); "John", 'M', 20, "John@hotmail.com", "2001-06- "Anmy", 'F', 15, "Anmy@gmail.com", "2003-01-01"); "Dustin", 'M', 24, "Dustin@hotmail.com", "2002- "Mary", 'F', 22, "Mary@sbc.net", "2004-01-030"); "Jessica", 'F', 21, "Jessica@calstatela.edu", "Rainy", 'M', 19, "rainy@calstatela.edu", "2004- Insert Into Students Values (0007, 01-12"); Insert Into Students Values (0008, "Kelvin", 'M', 19, "Kelvin@calstatela.edu", "2004-01-12"); Insert Into Professors Values(2001, "Scott", 'CS', "201-234-3213", "scott@calstatela.edu", "www.calstatela.edu/faculty/scott/"); Insert Into Professors Values (2002, "David", 'CE', "201-234-3112", "david@calstatela.edu", "www.calstatela.edu/faculty/david/"); Insert Into Professors Values (2003, "Judy", 'CE', "201-234-3002", "Judy@calstatela.edu", "www.calstatela.edu/faculty/Judy/"); Insert Into Professors Values (2004, "Gerald", 'CS', "201-234-3102", "Gerald@calstatela.edu", "www.calstatela.edu/faculty/Gerald/");
Expert Solution
Step 1⁷

The  SQL code is as following 

 

-- select columns p.prof_name, s.student_name with distinct keyword to get unique values

 

select distinct p.prof_name, s.student_name

 

from Supervise as sp -- from Supervise table with an alias name sp

 

inner join Professors as p -- inner join Professors to Supervise with an alias name p

 

on sp.prof_id = p.prof_id -- on condition to join both the tables

 

inner join Students as s -- inner join Students to Professors with an alias name s

 

on sp.student_id = s.student_id -- on condition to join both the tables

 

union -- union operator to combine left and right queries

 

select p.prof_name, concat('Total ', COUNT(distinct sp.student_id)) -- select columns p.prof_name, concat('Total ', COUNT(distinct sp.student_id))

 

from Supervise as sp -- from Supervise table with an alias name sp

 

inner join Professors as p -- inner join Professors to Supervise with an alias name p

 

on sp.prof_id = p.prof_id -- on condition to join both the tables

 

group by p.prof_id, p.prof_name -- group by to aggregate per professor

 

order by prof_name; -- order by to sort the results by professor name

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