Can we use more than one null value for unique key?
- 31 Answers
- 59977 Views
- A1 Technology, Wipro, I also Faced
- E-Mail Answers
Answer Posted / guest
No, we cannot use more than one null value in unique key.
This is the major difference between primary key and unique
key.
Primary key cannot contain null values
Whereas unique key can contain only one null value
| Is This Answer Correct ? | 5 Yes | 7 No |
Post New Answer View All Answers
Can you join views in sql?
Can 2 queries be executed simultaneously in a distributed database system?
how many ways to get the current time? : Sql dba
How to get list of all tables from a database?
How do you update a value in sql?
Is sql between inclusive?
How do I start sql profiler?
Is primary key always clustered index?
what is the difference between sql and t-sql? : Transact sql
what is row? : Sql dba
What is the difference between subquery and correlated query?
Does mysql support pl sql?
What is anonymous block in sql?
What is function and procedure in pl sql?
Could you please provide oca (oracle 10g) dumps for my certification ?
