Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Possible Duplicate:
Nullable Foreign Key bad practice?
I know foreign keys are used to relate or link different tables but my assignment is asking for specific conditions for the subject matter.
A foreign key may not be null when it is part of a composite primary key in the child table.