What are the titles of courses without prerequisites?
SELECT title FROM course WHERE course_id NOT IN (SELECT course_id FROM prereq)
SELECT title FROM course WHERE course_id NOT IN (SELECT course_id FROM prereq)
[{'title': 'C  Programming'}, {'title': 'The Music of Donovan'}, {'title': 'International Finance'}, {'title': 'Greek Tragedy'}, {'title': 'Virology'}, {'title': 'Compiler Design'}, {'title': 'Surfing'}, {'title': 'Latin'}, {'title': 'Composition and Literature'}, {'title': 'Music of the 50s'}, {'title': 'Visual BASIC'}, {'title': 'The Monkeys'}, {'title': 'FOCAL Programming'}, {'title': 'Calculus'}, {'title': 'The Beatles'}, {'title': 'World History'}, {'title': 'Tort Law'}, {'title': 'Corporate Law'}, {'title': 'Video Gaming'}, {'title': 'Bankruptcy'}, {'title': 'Organic Chemistry'}, {'title': 'Quantum Mechanics'}, {'title': 'Quantum Mechanics'}, {'title': 'The IBM 360 Architecture'}, {'title': 'Electricity and Magnetism'}, {'title': 'Elastic Structures'}, {'title': 'Computational Biology'}, {'title': 'Journalism'}, {'title': 'Physical Chemistry'}, {'title': 'Image Processing'}, {'title': 'Industrial Organization'}, {'title': 'Sanitary Engineering'}, {'title': 'Thermodynamics'}, {'title': 'Japanese'}, {'title': 'International Trade'}, {'title': 'Database System Concepts'}, {'title': 'Romantic Literature'}, {'title': 'Religion'}, {'title': 'Existentialism'}, {'title': 'Compiler Design'}, {'title': 'Geology'}, {'title': 'C  Programming'}, {'title': 'Manufacturing'}, {'title': 'Drama'}, {'title': 'Medieval Civilization or Lack Thereof'}, {'title': 'Differential Geometry'}, {'title': 'Bacteriology'}, {'title': 'International Trade'}, {'title': 'Aquatic Chemistry'}, {'title': 'Number Theory'}, {'title': 'Sailing'}, {'title': 'Physical Chemistry'}, {'title': 'Hydraulics'}, {'title': 'The Music of the Ramones'}, {'title': 'Mechanics'}, {'title': 'Hebrew'}, {'title': 'Computability Theory'}, {'title': 'Creative Writing'}, {'title': 'The Monkeys'}, {'title': 'Differential Geometry'}, {'title': 'Virology'}, {'title': 'Geology'}, {'title': 'Stream Processing'}, {'title': 'The Music of Donovan'}, {'title': 'Petroleum Engineering'}, {'title': 'Systems Software'}, {'title': 'Environmental Law'}, {'title': 'Data Mining'}, {'title': 'Medieval Civilization or Lack Thereof'}, {'title': 'Differential Geometry'}, {'title': 'International Communication'}, {'title': 'Diffusion and Phase Transformation'}, {'title': 'Differential Equations'}, {'title': 'Compiler Design'}, {'title': 'Aerodynamics'}, {'title': 'The Music of Dave Edmunds'}, {'title': 'Computability Theory'}, {'title': 'Cognitive Psychology'}, {'title': 'Tort Law'}, {'title': 'European History'}, {'title': 'Corporate Law'}, {'title': 'Multimedia Design'}, {'title': 'Animal Behavior'}, {'title': 'Graphics'}, {'title': 'Romantic Literature'}, {'title': 'Banking and Finance'}, {'title': 'Astronautics'}, {'title': 'How to Succeed in Business Without Really Trying'}, {'title': 'Race Car Driving'}, {'title': 'Milton'}, {'title': 'Topology'}, {'title': 'Video Gaming'}, {'title': 'Logic'}, {'title': 'Thermal Physics'}, {'title': 'Differential Geometry'}, {'title': 'The Music of Dave Edmunds'}, {'title': 'Greek Tragedy'}, {'title': 'Arabic'}, {'title': 'Compiler Design'}, {'title': 'Networking'}, {'title': 'Automobile Mechanics'}, {'title': 'Music of the 50s'}, {'title': 'C  Programming'}, {'title': 'Groups and Rings'}, {'title': 'Biostatistics'}, {'title': 'UNIX System Programmming'}, {'title': 'UNIX System Programmming'}, {'title': 'Music 2 New for your Instructor'}, {'title': 'Microeconomics'}, {'title': 'Plastics'}, {'title': 'Number Theory'}, {'title': 'Multivariable Calculus'}, {'title': 'Numerical Methods'}, {'title': 'Operating Systems'}, {'title': 'Numerical Methods'}, {'title': 'Strength of Materials'}, {'title': 'Fractal Geometry'}, {'title': 'Music of the 90s'}, {'title': 'Sanitary Engineering'}, {'title': 'The Music of Donovan'}, {'title': 'Quantum Mechanics'}]