Find the instructor who has taught the most number of distinct courses. Dont use ORDER BY and LIMIT in your solution.

Database to query from:

SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO";

-- -- Table structure for table `advisor` --

CREATE TABLE IF NOT EXISTS `advisor` ( `s_ID` varchar(5) NOT NULL DEFAULT '', `i_ID` varchar(5) DEFAULT NULL, PRIMARY KEY (`s_ID`), KEY `i_ID` (`i_ID`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1;

-- -- Dumping data for table `advisor` --

INSERT INTO `advisor` (`s_ID`, `i_ID`) VALUES ('00128', '45565'), ('12345', '10101'), ('23121', '76543'), ('44553', '22222'), ('45678', '22222'), ('76543', '45565'), ('76653', '98345'), ('98765', '98345'), ('98988', '76766');

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-- -- Table structure for table `classroom` --

CREATE TABLE IF NOT EXISTS `classroom` ( `building` varchar(15) NOT NULL DEFAULT '', `room_number` varchar(7) NOT NULL DEFAULT '', `capacity` decimal(4,0) DEFAULT NULL, PRIMARY KEY (`building`,`room_number`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1;

-- -- Dumping data for table `classroom` --

INSERT INTO `classroom` (`building`, `room_number`, `capacity`) VALUES ('Packard', '101', '500'), ('Painter', '514', '10'), ('Taylor', '3128', '70'), ('Watson', '100', '30'), ('Watson', '120', '50');

-- --------------------------------------------------------

-- -- Table structure for table `course` --

CREATE TABLE IF NOT EXISTS `course` ( `course_id` varchar(8) NOT NULL DEFAULT '', `title` varchar(50) DEFAULT NULL, `dept_name` varchar(20) DEFAULT NULL, `credits` decimal(2,0) DEFAULT NULL, PRIMARY KEY (`course_id`), KEY `dept_name` (`dept_name`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1;

-- -- Dumping data for table `course` --

INSERT INTO `course` (`course_id`, `title`, `dept_name`, `credits`) VALUES ('BIO-101', 'Intro. to Biology', 'Biology', '4'), ('BIO-301', 'Genetics', 'Biology', '4'), ('BIO-399', 'Computational Biology', 'Biology', '3'), ('CS-101', 'Intro. to Computer Science', 'Comp. Sci.', '4'), ('CS-190', 'Game Design', 'Comp. Sci.', '4'), ('CS-315', 'Robotics', 'Comp. Sci.', '3'), ('CS-319', 'Image Processing', 'Comp. Sci.', '3'), ('CS-347', 'Database System Concepts', 'Comp. Sci.', '3'), ('EE-181', 'Intro. to Digital Systems', 'Elec. Eng.', '3'), ('FIN-201', 'Investment Banking', 'Finance', '3'), ('HIS-351', 'World History', 'History', '3'), ('MU-199', 'Music Video Production', 'Music', '3'), ('PHY-101', 'Physical Principles', 'Physics', '4');

-- --------------------------------------------------------

-- -- Table structure for table `department` --

CREATE TABLE IF NOT EXISTS `department` ( `dept_name` varchar(20) NOT NULL DEFAULT '', `building` varchar(15) DEFAULT NULL, `budget` decimal(12,2) DEFAULT NULL, PRIMARY KEY (`dept_name`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1;

-- -- Dumping data for table `department` --

INSERT INTO `department` (`dept_name`, `building`, `budget`) VALUES ('Biology', 'Watson', '90000.00'), ('Comp. Sci.', 'Taylor', '100000.00'), ('Elec. Eng.', 'Taylor', '85000.00'), ('Finance', 'Painter', '120000.00'), ('History', 'Painter', '50000.00'), ('Music', 'Packard', '80000.00'), ('Physics', 'Watson', '70000.00');

-- --------------------------------------------------------

-- -- Table structure for table `instructor` --

CREATE TABLE IF NOT EXISTS `instructor` ( `ID` varchar(5) NOT NULL DEFAULT '', `name` varchar(20) NOT NULL, `dept_name` varchar(20) DEFAULT NULL, `salary` decimal(8,2) DEFAULT NULL, PRIMARY KEY (`ID`), KEY `dept_name` (`dept_name`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1;

-- -- Dumping data for table `instructor` --

INSERT INTO `instructor` (`ID`, `name`, `dept_name`, `salary`) VALUES ('10101', 'Srinivasan', 'Comp. Sci.', '65000.00'), ('12121', 'Wu', 'Finance', '90000.00'), ('15151', 'Mozart', 'Music', '40000.00'), ('22222', 'Einstein', 'Physics', '95000.00'), ('32343', 'El Said', 'History', '60000.00'), ('33456', 'Gold', 'Physics', '87000.00'), ('45565', 'Katz', 'Comp. Sci.', '75000.00'), ('58583', 'Califieri', 'History', '62000.00'), ('76543', 'Singh', 'Finance', '80000.00'), ('76766', 'Crick', 'Biology', '72000.00'), ('83821', 'Brandt', 'Comp. Sci.', '92000.00'), ('98345', 'Kim', 'Elec. Eng.', '80000.00');

-- --------------------------------------------------------

-- -- Table structure for table `prereq` --

CREATE TABLE IF NOT EXISTS `prereq` ( `course_id` varchar(8) NOT NULL DEFAULT '', `prereq_id` varchar(8) NOT NULL DEFAULT '', PRIMARY KEY (`course_id`,`prereq_id`), KEY `prereq_id` (`prereq_id`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1;

-- -- Dumping data for table `prereq` --

INSERT INTO `prereq` (`course_id`, `prereq_id`) VALUES ('BIO-301', 'BIO-101'), ('BIO-399', 'BIO-101'), ('CS-190', 'CS-101'), ('CS-315', 'CS-101'), ('CS-319', 'CS-101'), ('CS-347', 'CS-101'), ('EE-181', 'PHY-101');

-- --------------------------------------------------------

-- -- Table structure for table `section` --

CREATE TABLE IF NOT EXISTS `section` ( `course_id` varchar(8) NOT NULL DEFAULT '', `sec_id` varchar(8) NOT NULL DEFAULT '', `semester` varchar(6) NOT NULL DEFAULT '', `year` decimal(4,0) NOT NULL DEFAULT '0', `building` varchar(15) DEFAULT NULL, `room_number` varchar(7) DEFAULT NULL, `time_slot_id` varchar(4) DEFAULT NULL, PRIMARY KEY (`course_id`,`sec_id`,`semester`,`year`), KEY `building` (`building`,`room_number`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1;

-- -- Dumping data for table `section` --

INSERT INTO `section` (`course_id`, `sec_id`, `semester`, `year`, `building`, `room_number`, `time_slot_id`) VALUES ('BIO-101', '1', 'Summer', '2009', 'Painter', '514', 'B'), ('BIO-301', '1', 'Summer', '2010', 'Painter', '514', 'A'), ('CS-101', '1', 'Fall', '2009', 'Packard', '101', 'H'), ('CS-101', '1', 'Spring', '2010', 'Packard', '101', 'F'), ('CS-190', '1', 'Spring', '2009', 'Taylor', '3128', 'E'), ('CS-190', '2', 'Spring', '2009', 'Taylor', '3128', 'A'), ('CS-315', '1', 'Spring', '2010', 'Watson', '120', 'D'), ('CS-319', '1', 'Spring', '2010', 'Watson', '100', 'B'), ('CS-319', '2', 'Spring', '2010', 'Taylor', '3128', 'C'), ('CS-347', '1', 'Fall', '2009', 'Taylor', '3128', 'A'), ('EE-181', '1', 'Spring', '2009', 'Taylor', '3128', 'C'), ('FIN-201', '1', 'Spring', '2010', 'Packard', '101', 'B'), ('HIS-351', '1', 'Spring', '2010', 'Painter', '514', 'C'), ('MU-199', '1', 'Spring', '2010', 'Packard', '101', 'D'), ('PHY-101', '1', 'Fall', '2009', 'Watson', '100', 'A');

-- --------------------------------------------------------

-- -- Table structure for table `student` --

CREATE TABLE IF NOT EXISTS `student` ( `ID` varchar(5) NOT NULL DEFAULT '', `name` varchar(20) NOT NULL, `dept_name` varchar(20) DEFAULT NULL, `tot_cred` decimal(3,0) DEFAULT NULL, PRIMARY KEY (`ID`), KEY `dept_name` (`dept_name`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1;

-- -- Dumping data for table `student` --

INSERT INTO `student` (`ID`, `name`, `dept_name`, `tot_cred`) VALUES ('00128', 'Zhang', 'Comp. Sci.', '102'), ('12345', 'Shankar', 'Comp. Sci.', '32'), ('19991', 'Brandt', 'History', '80'), ('23121', 'Chavez', 'Finance', '110'), ('44553', 'Peltier', 'Physics', '56'), ('45678', 'Levy', 'Physics', '46'), ('54321', 'Williams', 'Comp. Sci.', '54'), ('55739', 'Sanchez', 'Music', '38'), ('70557', 'Snow', 'Physics', '0'), ('76543', 'Brown', 'Comp. Sci.', '58'), ('76653', 'Aoi', 'Elec. Eng.', '60'), ('98765', 'Bourikas', 'Elec. Eng.', '98'), ('98988', 'Tanaka', 'Biology', '120');

-- --------------------------------------------------------

-- -- Table structure for table `takes` --

CREATE TABLE IF NOT EXISTS `takes` ( `ID` varchar(5) NOT NULL DEFAULT '', `course_id` varchar(8) NOT NULL DEFAULT '', `sec_id` varchar(8) NOT NULL DEFAULT '', `semester` varchar(6) NOT NULL DEFAULT '', `year` decimal(4,0) NOT NULL DEFAULT '0', `grade` varchar(2) DEFAULT NULL, PRIMARY KEY (`ID`,`course_id`,`sec_id`,`semester`,`year`), KEY `course_id` (`course_id`,`sec_id`,`semester`,`year`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1;

-- -- Dumping data for table `takes` --

INSERT INTO `takes` (`ID`, `course_id`, `sec_id`, `semester`, `year`, `grade`) VALUES ('00128', 'CS-101', '1', 'Fall', '2009', 'A'), ('00128', 'CS-347', '1', 'Fall', '2009', 'A-'), ('12345', 'CS-101', '1', 'Fall', '2009', 'C'), ('12345', 'CS-190', '2', 'Spring', '2009', 'A'), ('12345', 'CS-315', '1', 'Spring', '2010', 'A'), ('12345', 'CS-347', '1', 'Fall', '2009', 'A'), ('19991', 'HIS-351', '1', 'Spring', '2010', 'B'), ('23121', 'FIN-201', '1', 'Spring', '2010', 'C+'), ('44553', 'PHY-101', '1', 'Fall', '2009', 'B-'), ('45678', 'CS-101', '1', 'Fall', '2009', 'F'), ('45678', 'CS-101', '1', 'Spring', '2010', 'B+'), ('45678', 'CS-319', '1', 'Spring', '2010', 'B'), ('54321', 'CS-101', '1', 'Fall', '2009', 'A-'), ('54321', 'CS-190', '2', 'Spring', '2009', 'B+'), ('55739', 'MU-199', '1', 'Spring', '2010', 'A-'), ('76543', 'CS-101', '1', 'Fall', '2009', 'A'), ('76543', 'CS-319', '2', 'Spring', '2010', 'A'), ('76653', 'EE-181', '1', 'Spring', '2009', 'C'), ('98765', 'CS-101', '1', 'Fall', '2009', 'C-'), ('98765', 'CS-315', '1', 'Spring', '2010', 'B'), ('98988', 'BIO-101', '1', 'Summer', '2009', 'A'), ('98988', 'BIO-301', '1', 'Summer', '2010', NULL);

-- --------------------------------------------------------

-- -- Table structure for table `teaches` --

CREATE TABLE IF NOT EXISTS `teaches` ( `ID` varchar(5) NOT NULL DEFAULT '', `course_id` varchar(8) NOT NULL DEFAULT '', `sec_id` varchar(8) NOT NULL DEFAULT '', `semester` varchar(6) NOT NULL DEFAULT '', `year` decimal(4,0) NOT NULL DEFAULT '0', PRIMARY KEY (`ID`,`course_id`,`sec_id`,`semester`,`year`), KEY `course_id` (`course_id`,`sec_id`,`semester`,`year`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1;

-- -- Dumping data for table `teaches` --

INSERT INTO `teaches` (`ID`, `course_id`, `sec_id`, `semester`, `year`) VALUES ('10101', 'CS-101', '1', 'Fall', '2009'), ('10101', 'CS-315', '1', 'Spring', '2010'), ('10101', 'CS-347', '1', 'Fall', '2009'), ('12121', 'FIN-201', '1', 'Spring', '2010'), ('15151', 'MU-199', '1', 'Spring', '2010'), ('22222', 'PHY-101', '1', 'Fall', '2009'), ('32343', 'HIS-351', '1', 'Spring', '2010'), ('45565', 'CS-101', '1', 'Spring', '2010'), ('45565', 'CS-319', '1', 'Spring', '2010'), ('76766', 'BIO-101', '1', 'Summer', '2009'), ('76766', 'BIO-301', '1', 'Summer', '2010'), ('83821', 'CS-190', '1', 'Spring', '2009'), ('83821', 'CS-190', '2', 'Spring', '2009'), ('83821', 'CS-319', '2', 'Spring', '2010'), ('98345', 'EE-181', '1', 'Spring', '2009');

-- --------------------------------------------------------

-- -- Table structure for table `time_slot` --

CREATE TABLE IF NOT EXISTS `time_slot` ( `time_slot_id` varchar(4) NOT NULL DEFAULT '', `day` varchar(1) NOT NULL DEFAULT '', `start_hr` decimal(2,0) NOT NULL DEFAULT '0', `start_min` decimal(2,0) NOT NULL DEFAULT '0', `end_hr` decimal(2,0) DEFAULT NULL, `end_min` decimal(2,0) DEFAULT NULL, PRIMARY KEY (`time_slot_id`,`day`,`start_hr`,`start_min`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1;

-- -- Dumping data for table `time_slot` --

INSERT INTO `time_slot` (`time_slot_id`, `day`, `start_hr`, `start_min`, `end_hr`, `end_min`) VALUES ('A', 'M', '8', '0', '8', '50'), ('A', 'W', '8', '0', '8', '50'), ('A', 'F', '8', '0', '8', '50'), ('B', 'M', '9', '0', '9', '50'), ('B', 'W', '9', '0', '9', '50'), ('B', 'F', '9', '0', '9', '50'), ('C', 'M', '11', '0', '11', '50'), ('C', 'W', '11', '0', '11', '50'), ('C', 'F', '11', '0', '11', '50'), ('D', 'M', '13', '0', '13', '50'), ('D', 'W', '13', '0', '13', '50'), ('D', 'F', '13', '0', '13', '50'), ('E', 'T', '10', '30', '11', '45'), ('E', 'R', '10', '30', '11', '45'), ('F', 'T', '14', '30', '15', '45'), ('F', 'R', '14', '30', '15', '45'), ('G', 'M', '16', '0', '16', '50'), ('G', 'W', '16', '0', '16', '50'), ('G', 'F', '16', '0', '16', '50'), ('H', 'W', '10', '0', '12', '30');

Classroom (building, room number, capacity) Department(dept name, building, budget) Course(course id, title, dept_name, credits) Instructor(i id, name, dept_name, salary) Section(course id, sec id, semester, year, building, room number, time slot id) Teaches(i id, course id, sec_id, semester year Student's id, name, dept_name, tot cred) Takes(s id, course id, sec id, semester, year grade) Advisor's id, i_id) Time slot(time slot id, day, start hr start min, end hr, end min) Prereg(course id, prereq id) Grade points (grade, points)