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a guest Dec 11th, 2019 73 Never
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  1. /*Task 5*/
  2. SELECT DISTINCT tc.id_teacher, tc.name, tc.surname
  3. FROM courses cs
  4. INNER JOIN exams ex
  5. ON cs.id_course = ex.id_course
  6. INNER JOIN teachers tc
  7. ON tc.id_teacher = ex.id_teacher
  8. WHERE LOWER(course_name) = 'data warehouses'
  9. ORDER BY 3;
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