Is a NULL value same as zero or a blank space? If not then what is the – InterviewSolution

InterviewSolution

1.	Is a NULL value same as zero or a blank space? If not then what is the difference?
Answer» A NULL value is not same as zero or a blank space. A NULL value is a value which is ‘unavailable, unassigned, unknown or not applicable’. Whereas, zero is a number and blank space is a character.

Discussion

No Comment Found

Related InterviewSolutions

Say True or False. Give explanation if False.A view doesn’t have data of its own.
What is a view? Why should you use a view?
Which SQL statement is used to add, modify or drop columns in a database table?
Say True or False. Give explanation if False.A DROP TABLE statement can be rolled back.
What is the difference between VARCHAR2 AND CHAR datatypes?
Say True or False. Give explanation if False.A DDL statement or a DCL statement is automatically committed.
What is the purpose of the MERGE statement in SQL?
Say True or False. Give explanation if False.You can use a subquery in an INSERT statement.
Say True or False. Give explanation if False.Attempting to delete a record with a value attached to an integrity constraint, returns an error.
Can you remove rows from a table based on values from another table? Explain.