Can we use more than one null value for unique key?
- 31 Answers
- 56537 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 are the features of pl sql?
What does rownum mean in sql?
What are triggers in sql?
how to include character strings in sql statements? : Sql dba
What are the different dcl commands in sql?
What are the different schemas objects that can be created using pl/sql?
How is a PL/SQL code compiled?
how to select first 5 records from a table? : Sql dba
Describe types of sql statements?
How to handle bulk data?
What is the purpose of the sql select top clause?
What is crud stand for?
Can we rollback delete command?
What are the differences between in and exists clause?
What do you think about pl/sql?
