What is the difference between unique key and primary key?
Answer:
This is a typical SQL interview question and below is the comparison sheet.
Below is a nice video which demonstrates the same in a much precise manner...Enjoy.
http://www.youtube.com/embed/8iIvyNPwruU
This is a typical SQL interview question and below is the comparison sheet.
Below is a nice video which demonstrates the same in a much precise manner...Enjoy.http://www.youtube.com/embed/8iIvyNPwruU
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