Interested to Buy Any Domain ? << Click Here >> for more details...
Can we use more than one null value for unique key?
- 31 Answers
- 64073 Views
- A1 Technology, Wipro, I also Faced
- E-Mail Answers
Answer Posted / christina
Yes, We can use more then one null value in unique key ,
because "null" means undefined or unknown so we can add any
number of null values in unique key...
This is the major difference between primary nd unique key,
Primary key doesn't allow null values to be entered into
the columns marked as priamry key and Unique allow us to
enter null values...............
| Is This Answer Correct ? | 5 Yes | 2 No |
Post New Answer View All Answers
What is the sql query to display the current date?
What is rank () in sql?
Explain the working of foreign key?
What is the difference between jpql and sql?
What are the most important ddl statements in sql?
How many postgresql users are there, worldwide?
what is offset-fetch filter in tsql? : Transact sql
What mean sql?
how to install mysql? : Sql dba
Explian rowid, rownum? What are the psoducolumns we have?
Which data type is a composite type?
What are tables and fields?
what is the difference between primary key and unique key? : Sql dba
what is dbms? : Sql dba
Mention what does plvtab enables you to do when you showthe contents of pl/sql tables?
