Can we use more than one null value for unique key?
- 31 Answers
- 59884 Views
- A1 Technology, Wipro, I also Faced
- E-Mail Answers
Answer Posted / debdut bhaumik
Yes , More than one field can be NULL in a unique Key
column. Because a Null values is not equal to another null
value. So, no duplicate value is there.
| Is This Answer Correct ? | 26 Yes | 12 No |
Post New Answer View All Answers
What is the difference between function, procedure and package in pl/sql?
What is the maximum number of rows in sql table?
Why do we need sharding?
What is data modelling in sql?
Can you rollback after commit?
What is a procedure in pl sql?
What is cursor in pl sql with examples?
How much does sqlite cost?
Does truncate free space?
How to select 10 records from a table?
Why do we use joins?
What is difference between rank () row_number () and dense_rank () in sql?
How many functions are there in sql?
What is cursor explain with example?
what are all the different types of indexes? : Sql dba
