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UNF:
student(Name, HomeMobilePhoneNumbers, StudentID, MajorCode1, MajorCode2, MajorCode3)
1NF:
Name is non-atomic.
Move to two fields (firstname and lastname).
HomeMobilePhoneNumbers is non-atomic.
Move to a linked table (studentphone).
HomeMobilePhoneNumbers is changed to number and a type field is added.
MajorCode1, MajorCode2, MajorCode3 are repeating fields.
Move to an entity table (major)and add a linking table (student_major).
MajorCode1, MajorCode2, MajorCode3 are named Code.
student(StudentID*, firstname, lastname)
studentphone(StudentID*@, number*, type)
major(student_major*)
student_major(StudentID*@, student_major*@)
2NF: No changes needed.
student(StudentID*, firstname, lastname)
studentphone(StudentID*@, number*, type)
major(student_major*)
student_major(StudentID*@, student_major*@)
3NF: No changes needed.
student(StudentID*, firstname, lastname)
studentphone(StudentID*@, number*, type)
major(student_major*)
student_major(StudentID*@, student_major*@)
student(StudentID*, firstname, lastname)
Avram Hinton 34673656
Hayes Gibson 83681840
Kristen Acosta 94086534
studentphone(StudentID*@, number*, type)
34673656 103-391-7811 home
34673656 676-683-6301 mobile
83681840 447-149-5334 home
94086534 972-658-1570 mobile
major(student_major*)
NSA
CSS
CST
CP
MAD
student_major(StudentID*@, student_major*@)
34673656 NSA
34673656 CSS
34673656 CST
83681840 CST
94086534 CP
94086534 MAD
2NF: OK
3NF: OK