What is difference between UNIQUE constraint and PRIMARY KEY
constraint ?
Answer Posted / allin
The Primarykey Constraint= unique + Not Null constraints.
For the Unique the meaning it self it is telling unique
value. won't accept duplicate values.
Thanks & Regards,
RatnaRao
9833847339
Is This Answer Correct ? | 9 Yes | 0 No |
Post New Answer View All Answers
What is columnar storage what is the advantage?
What is Virtual Private Database in Oracle?
What is an oracle user account?
What is a cursor variable?
Can we use oracle pl/sql block in core java? if so how? pls get back to me .....
You have found corruption in a tablespace that contains static tables that are part of a database that is in NOARCHIVE log mode. How would you restore the tablespace without losing new data in the other tablespaces?
What are the attributes of the cursor?
What is the difference between Delete, Truncate and Drop in Oracle?
Can u please explain me the Discussion on Except ,using cast like type cast. Question in the context of difference between two tables
What is max rowid in oracle?
How do we display rows from the table without duplicates?
What would you do with an in-doubt distributed transaction?
What are the parameters that we can pass through a stored procedure?
How to use attributes of the implicit cursor in oracle?
Why is oracle database so popular?