Question

Example of foriegn key and primary key

Answer 1

Answer:

Foreign key is customer number

Primary key is customer I'd.

Source - Google

Answer 2

Answer:

Primary Key Example: Refer the figure –

STUD_NO, as well as STUD_PHONE both, are candidate keys for relation STUDENT but STUD_NO can be chosen as the primary key (only one out of many candidate keys).

Foreign Key Example: Refer the figure –

STUD_NO in STUDENT_COURSE is a foreign key to STUD_NO in STUDENT relation.

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