Answer Posted / naresh
Primary key:it can not be null
Unique:it can have only one null value in a table.
| Is This Answer Correct ? | 13 Yes | 2 No |
Post New Answer View All Answers
What is difference between delete and truncate commands?
What is the most common trace flags used with sql server?
What is triggers and its types?
What is inner join in sql server joins?
How should i optimize the time for execution of stored procedure having single input and many output from the different tables?
What is a raid and what are different types of raid configurations?
Explain the properties of subqueries in sql server?
What is the use of group by clause?
How to create indexed view?
What does Master database contains?
What do you understand by intent locks?
How many null values we can have in a unique key field in sql server?
What are cursors in ms sql server?
What is lock escalation? : sql server database administration
Define tool Manage Statistics in SQL Server 2000 query ?