Can we use more than one null value for unique key?
- 31 Answers
- 56625 Views
- A1 Technology, Wipro, I also Faced
- E-Mail Answers
Answer Posted / anil kumar abbireddy
We can insert any number of null values in the column which
contains the unique key
the reason is NULL is not equal to anothere NUll
so each null is different so there is no question of
duplication
| Is This Answer Correct ? | 140 Yes | 30 No |
Post New Answer View All Answers
What is on delete set null?
What is sql data?
what are the nonstandard string types? : Sql dba
Can procedure in package be overloaded?
How do you drop a trigger?
What is the difference between drop and truncate commands?
What is union and union all keyword in sql?
How many row comparison operators are used while working with a subquery?
Does sql backup shrink transaction log?
Can a select statement fire a trigger?
What are the properties of a transaction?
How do I view tables in sql developer?
What are the types of index in sql?
Why triggers are used?
What is sql injection vulnerability?
