what is null value?
Answers were Sorted based on User's Feedback
Answer / ashu_deepu
most generally confuse the null value with zero.
but zero is different then null.
null can be understand as unknown value.
| Is This Answer Correct ? | 3 Yes | 1 No |
Answer / mohit gupta
Null is a value that is unavailable, unassigned and unknown.
| Is This Answer Correct ? | 3 Yes | 2 No |
Answer / guneetinder singh
Null is not a value but we can say it is unknown.
| Is This Answer Correct ? | 4 Yes | 4 No |
Null value is that value which is neither zero or space or
any character.This value is defined by Oracle server, and
hence cannot be described.Also every null value generated
by server is unique than another..hence we cannot compare
it with character, numeric or date functions.
| Is This Answer Correct ? | 4 Yes | 4 No |
Answer / kuldeep singh
Null value is that value which is neither zero or space or
any character.null is not a value its just a concept to
avoid all values.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / bharat_itstud
null value is a value i.e. unavalable, unknown & it is
equal to nothing.....
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / sachin
A null value is not defined,applicable,available,known .
It can be a blank space or it can be a zero but it is not
equal to either zero or blank space......
| Is This Answer Correct ? | 0 Yes | 1 No |
When do we use group by clause in a sql query?
Can we write dml statement in function in oracle?
Can select statements be used on views in oracle?
Please explain me all types of Data models. Also give me the details if each model can have other name.for example:schematic data model is also known as conceptual data model and entity relation data model.
What do you mean by a database transaction & what all tcl statements are available in oracle?
In my table i have 4 columns with 100 records but in that 4 columns one column contains all NULL values so can i add NOT NULL CONSTRAINT on that column......... ok if it is not possible, can i add NOT NULL CONSTRAINT from 101 Record Onwards?
In Oracle Clinical 4.5.0, can the VIEW_TEMPLATE_ID column in DATA_EXTRACT_VIEWS table contain NULL value?
which is the best training centre for learning oracle?
What is hash cluster in oracle?
What is private procedure oracle?
What are the arithmetic operations?
What are the different approaches used by Optimizer in choosing an execution plan ?