Context: CREATE TABLE Students (first_name VARCHAR, middle_name VARCHAR, last_name VARCHAR, student_id VARCHAR); CREATE TABLE Student_Enrolment (student_id VARCHAR)
Question: Who are enrolled in 2 degree programs in one semester? List the first name, middle name and last name and the id.
Answer: SELECT T1.first_name, T1.middle_name, T1.last_name, T1.student_id FROM Students AS T1 JOIN Student_Enrolment AS T2 ON T1.student_id = T2.student_id GROUP BY T1.student_id HAVING COUNT(*) = 2