Interested to Buy Any Domain ? << Click Here >> for more details...
Can A column defined as PRIMARY KEY can have NULL values ?
- 2 Answers
- 5016 Views
- I also Faced
- E-Mail Answers
Answer Posted / parul chaudhary
No,a coloum defined as PRIMARY KEY can't have NULL values,
because when we assign a coloum as a PRIMARY KEY that mean
its a unique coloum by which whole the table have to be
accessed.
| Is This Answer Correct ? | 5 Yes | 0 No |
Post New Answer View All Answers
What is meant by database system?
How to reorder the table columns (fields)?
Explain the importance of database partitioning.
What is the type of image in database?
What is 3 level architecture dbms?
What are the four components of a database system?
How does a database partition work?
What is denormalization and why would someone consider doing so?
What is the purpose of a database table?
Explain the use of assign statement in progress database?
How index hunting contributes in improving the query performance?
What are the main functions of a database management system?
Explain some of the uses of openedge architect features useful for a developer?
How do you set a primary key?
How do you performance tune a database?
