Can we use more than one null value for unique key?
- 31 Answers
- 56634 Views
- A1 Technology, Wipro, I also Faced
- E-Mail Answers
Answer Posted / slimtech
The answer to this question depends on the database that we
are using
1. In SQL Server and DB2, we can insert only one null value
in the Unique Key column.
2. In Oracle, we can insert multiple null values
| Is This Answer Correct ? | 31 Yes | 0 No |
Post New Answer View All Answers
Which column of the user triggers data dictionary view displays the database event that will fire the trigger?
how to increment dates by 1 in mysql? : Sql dba
What is a variable in sql?
What is difference between pls_integer and integer?
Describe sql comments?
What does partition by mean in sql?
what are the system privileges that are required by a schema owner (user) to create a trigger on a table?
What is full join?
What is meaning of <> in sql?
What are three advantages to using sql?
How many types of indexes are there in sql?
List the different type of joins?
What is sql indexing?
What is case function?
What is auto increment?
