Interested to Buy Any Domain ? << Click Here >> for more details...
Can we use more than one null value for unique key?
- 31 Answers
- 64151 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
How to convert comma separated string to array in pl/sql?
What is the use of desc in sql?
what are the features and advantages of object-oriented programming? : Sql dba
which command using query analyzer will give you the version of sql server and operating system? : Sql dba
Does varchar need length?
what is sql in mysql? : Sql dba
Explain scalar functions in sql?
Does sql support programming?
What does 0 mean in sql?
How do I start sql profiler?
what is a trigger in mysql? : Sql dba
What are the advantages of indexing?
Are stored procedures faster than dynamic sql?
What is the purpose of normalization?
Does inner join remove duplicates?
