Difference between primary key and unique key ?
- 77 Answers
- 190698 Views
- Accenture, B2B Software Technologies, Cognizant, HP Finsoft, IndiaNIC, Karomi Technology, Keane India Ltd, L&T, Onward eServices, R Systems, Shakti, Techtic Solutions, I also Faced
- E-Mail Answers
Answer Posted / chauhan rakesh botad
Primary key doesnot allow null value but unique key allows
null value. We can declare only one primary key in a table
but a table can have multiple unique key(column assign).
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
What is oracle rownum?
What is data block in Oracle?
How to best split csv strings in oracle 9i?
What is a table index in oracle?
How oracle handles dead locks?
How to turn on or off recycle bin for the instance?
How do I connect to oracle?
Is oracle the best database?
What are the types of trigger in oracle?
What is a lookup table in oracle?
Please send me Informatica 8.1 certification dumps, my mail id mona85gupta@gmail.com
How to load data from external tables to regular tables?
List the types of joins used in writing subqueries?
State some uses of redo log files?
What is an oracle recycle bin?
