Can we have more than one NULL in a column having unique
constraint?
Answer Posted / atikullah
No, I think unique constraint contain no duplicate value in
a column. There are only contains unique value
| Is This Answer Correct ? | 0 Yes | 1 No |
Post New Answer View All Answers
Explain having clause and where clause?
Difference between uniqe index and uniqe constraint?
What is the difference between a "where" clause and a "having" clause?
What are two difference between sql azure and azure tables?
What are the character string functions supported by sql server 2005?
What is difference between stored procedure and user defined function?
You have a stored procedure, which execute a lengthy batch job. This stored procedure is called from a trigger you do not want to slow the data entry process you do not want trigger to wait for this batch job to finish before it completes itself what you can do to speed up the process?
What is table-valued sub query?
What is user-defined function?
How do you open a cluster administrator?
What are constraints?
What is the openxml statement in sql server?
How do I view a stored procedure in sql server?
Explain foreign key in sql server?
How to optimize stored procedures in sql server?