mysql stuck at query

manpreet Best Answer 2 years ago

I have a database of a college. I am stuck and don't understand a query that I have to write. I have to retrieve names of instructors teaching Computer Science courses, the sections, course number, section number, year, and semester that they are teaching, and the total number of students in the sections. I am not sure what the output should be like. So far I have written:

SELECT i.name,t.number,t.year,t.semester,t.section_number FROM Instructor as i,Teaches as t WHERE i.department LIKE '%Computer Science%'; 

create table Course (
  number int,
  title varchar(255),
  credits int,
  syllabus varchar(255),
  PRIMARY KEY (number)
  );

INSERT INTO Course VALUES (620,'Algorithm',3,'XYZ');
INSERT INTO Course VALUES (621,'Algorithm',3,'XYZ');
INSERT INTO Course VALUES (232,'Java',2,'ABC');
INSERT INTO Course VALUES (420,'Cpp',2,'PQRS');
INSERT INTO Course VALUES (720,'Big Data',3,'NVGY');
INSERT INTO Course VALUES (120,'Intelligent System',4,'KJHU');
INSERT INTO Course VALUES (220,'Operating System',3,'GED');
INSERT INTO Course VALUES (480,'Graphics',4,'RSFN');
INSERT INTO Course VALUES (520,'Distributed Networks',3,'NHU');
INSERT INTO Course VALUES (820,'Data Mining',3,'TYU');
INSERT INTO Course VALUES (700,'Cryptography',1,'MNO');

create table Student (
  student_id int,
  name varchar(255),
  department varchar(255),
  PRIMARY KEY (student_id)
  );

INSERT INTO Student VALUES (2345,'Mike','Computer Science');
INSERT INTO
                                                

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