Student: (student number, name, gender, date of birth, native place, class) course information tableCourse: (course number, course name, credits, class hours, prerequisite courses) transcriptScore: (student number, course number, semester, grade)Every non-main attribute in the above-mentioned relationship pattern is completely functional dependent on each code, and at the same time, no attribute depends on any group of attributes of non-code, and all the main attributes and attributes are completely functional dependent on each code that does not contain him. It is estimated that the above-mentioned relationship is BCNF pattern.