Question

Are the null and zero have similar values?

Answer 1

Hey mate here is your answer....

"Zero" is a value. It is the unique, known quantity of zero, which is meaningful in arithmetic and other math. "Null" is a non-value. It is a "placeholder" for a data value that is not known or not specified.

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Answer 2

A null is neither an empty string (for data types for characters or dates) nor a negative value (for data types numerics).

The specification of ANSI SQL-92 states that for all data types nulls must be identical so that the nulls are handled consistently.

Explanation:

• If the value in the column is unknown or missing, a null value is used in a relationship database.
• Null is not an empty string, nor a zero value (for binary data types). Zero is not a null string.
• For any given data type a null must be the same so that all nulls are handled consistently in the ANSI SQL-92 specification.
• The namespace of System.
• SqlTypes offers zero sémantics through the INullable interface implementation.
• Each data type has a unique IsNull property and a zero value in System. Data. SqlTypes, which can be assigned to an instance.