Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / sohini ghosh
In RDBMS, a unique key can uniquely identify each row in a
table, and is closely related to the Super key concept. A
unique key comprises a single column or a set of columns.it
can be null.
A primary key is a special case of unique key. Primary keys
may consist of a single attribute or multiple attributes in
combination.It can't be null..
| Is This Answer Correct ? | 0 Yes | 2 No |
Post New Answer View All Answers
Why singleton pattern is better than creating singleton class with static instance?
Discuss different types of errors that generally occur while programming.
What is Applet Stub Interface ?
What are peerless components?
What do you mean by stream pipelining in java 8?
Tell me are there implementations for sorting and searching in the java libarary?
what is aggregation in java?
what do you mean by stream pipelining in java 8? Explain
Which collection is ordered in java?
What is the difference between array and array list in java?
Can inner class extend any class?
Explain inheritance in java?
Give me an example of array and linked list? Where they can be used?
Which is easier netbeans or eclipse?
What are the benefits of java?
