DBA > Job Interview Questions > Oracle DBA Interview questions and Answers

What is difference between UNIQUE and PRIMARY KE

More DBA job interview questions and answers at http://dba.fyicenter.com/Interview-Questions/

(Continued from previous question...)

What is difference between UNIQUE and PRIMARY KEY constraints?

An UNIQUE key can have NULL whereas PRIMARY key is always not NOT NULL. Both bears unique values.

(Continued on next question...)

Other Job Interview Questions