Interested to Buy Any Domain ? << Click Here >> for more details...
what is difference between "Primary key" and "Unique key"?
- 4 Answers
- 9319 Views
- PreVator, I also Faced
- E-Mail Answers
Answer Posted / satya_k21
Hi,
Primary Key: Not Null+ unique.but it wont allows null
values.
Unique: It allows null values , but it should be unique.
Regards,
Satya.k
| Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
How many types of privileges are available in sql?
What are different types of tables in sql?
Explain the update statement in sql
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 are all the different normalizations?
How do you sort in sql?
what is an index? : Sql dba
What is an invalid partition table?
What are crud methods?
Is keyword pl sql?
When is the explicit cursor used ?
what is recursive stored procedure? : Sql dba
How do I filter in sql profiler?
Can a foreign key be null?
what is self-join? : Sql dba
