I need unique answer, NO COPY OR HANDWRITING PLEASE! What is a Database key? Explain various...
I need unique answer, NO COPY OR HANDWRITING PLEASE!
What is a Database key? Explain various types of database keys (Super key, Candidate key, Primary key and Foreign key) with your clear definitions/ideas and at least one appropriate example for each one of them.
Homework Answers
Super key:- a super key is any attribute or group of attributes which is able to identify two tuples uniquely.all the primary key and Candidate keys are also super key.
A super key can have some extra attributes than a key actually needs.
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I need unique answer, NO COPY OR HANDWRITING PLEASE!
What is a Database key? Explain various...
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