Null may refer to:

Science, technology, and mathematics

Computing

Null (SQL) In SQL, null or NULL is a special marker used to indicate that a data value does not exist in the database. Introduced by the creator of the relational database model, E. F. Codd, SQL null serves to fulfil the requirement that all ''true ...

(or NULL), a special marker and keyword in SQL indicating that something has no value *

Null character The null character (also null terminator) is a control character with the value zero. It is present in many character sets, including those defined by the Baudot and ITA2 codes, ISO/IEC 646 (or ASCII), the C0 control code, the Universal Code ...

, the zero-valued ASCII character, also designated by , often used as a terminator, separator or filler. This symbol has no visual representation *

Null pointer In computing, a null pointer or null reference is a value saved for indicating that the pointer or reference does not refer to a valid object. Programs routinely use null pointers to represent conditions such as the end of a list of unknown lengt ...

or reference (sometimes written NULL, nil, or None), an object pointer (or reference) not currently set to point (or refer) to a valid object

Mathematics

* Null (mathematics), a zero value in several branches of mathematics

Physics

* Null (physics), a point in a field where the field quantity is zero * Null (radio), a concept in electromagnetism

Arts and media

*The Null Corporation, an imprint of the band

Nine Inch Nails Nine Inch Nails, commonly abbreviated as NIN and stylized as NIИ, is an American industrial rock band formed in Cleveland in 1988. Singer, songwriter, multi-instrumentalist, and producer Trent Reznor was the only permanent member of the ban ...

* ''Null'' (Intronaut EP), 2006 * ''Null'' (Foetus EP), 1995 *Null, an identity of the character

Gray Fox The gray fox (''Urocyon cinereoargenteus''), or grey fox, is an omnivorous mammal of the family Canidae, widespread throughout North America and Central America. This species and its only congener (biology), congener, the diminutive island fox ...

in the ''Metal Gear Solid: Portable Ops'' video game *Null, a villain from '' Teenage Mutant Ninja Turtles Adventures''

People with the surname

* Christopher Null (born 1971), American writer and film critic *

Eduard van der Nüll Eduard van der Nüll (9 January 1812 (baptized) – 4 April 1868) was an Austrian architect, who was one of the great masters in the historicist style of Vienna's Ringstrasse. ''Architectural Theory: An Anthology from Vitruvius to 1870'' ...