Can we use more than one null value for unique key?
Answer Posted / anjani kumar
Yes,Multiple Null values are allowed in Unique key
Constraint because each Null is different from another Null
so there is no case of duplication.
| Is This Answer Correct ? | 2 Yes | 3 No |
Post New Answer View All Answers
what is top in tsql? : Transact sql
What is scope and visibility in PL/SQL?
How does rowid help in running a query faster?
Explain polymorphism in pl/sql.
Explain the steps needed to create the scheduled job?
What do we need to check in database testing?
Why cross join is used?
What is the difference between the conventional and direct path loads? : aql loader
How to run sql functions in pl/sql?
What are the limitations of sql express?
What are transaction and its controls?
Why is a primary key important?
How many types of keys are there in sql?
Why should I use postgresql?
Which query operators in sql is used for pattern matching?