Interested to Buy Any Domain ? << Click Here >> for more details...
Can we use more than one null value for unique key?
- 31 Answers
- 64085 Views
- A1 Technology, Wipro, I also Faced
- E-Mail Answers
Answer Posted / raman
Primary Key is a combination of Unique and NOT NULL
Constraints so it can’t have duplicate values or any NUll
Whereas for Oracle UNIQUE Key can have any number of NULL
but for SQL Server It can have only one NULL
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
how would you get the current date in mysql? : Sql dba
What is the benefit of foreign key?
What is the difference between delete and truncate statement in sql?
What is autocommit sql?
Why do we use cursors?
mention if it is possible to import data directly from t-sql commands without using sql server integration services? If yes, what are the commands? : Transact sql
What is execute immediate?
Is sql port 1433 encrypted?
Why select is used in sql?
Can we have two clustered index on a table?
What is the difference between left outer join and left join?
What is over () in sql?
Why use triggers in sql?
Can we create foreign key without primary key?
What are the indexing methods?
