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Null (SQL)

Known as: Sql case, NULLIF, C-table 
Null is a special marker used in Structured Query Language (SQL) to indicate that a data value does not exist in the database. Introduced by the… 
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Related topics

Related topics

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ACM Transactions on Database SystemsAggregate functionB-treeCheck constraint

Papers overview

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Highly Cited
2011
Highly Cited
2011
Armchair graphene nanoribbons: PT-symmetry breaking and exceptional points without dissipation
We consider a single-layer graphene nanoribbon with armchair edges and with a longitudinally constant external potential… 
2007
2007
Undocumented and Hard-to-find PROC SQL ® Features
The SQL Procedure contains many powerful and elegant language features for SQL users. This paper presents SQL topics that will… 
2004
2004
Gold/carbon composite tubes and gold nanowires by impregnating templates with hydrogen tetrachloroaurate/acetone solutions
Carbon/gold composite nanotubes as well as gold nanorods were synthesized by the impregnation of porous alumina with diluted… 
2004
2004
Buffer Layer Assisted Laser Patterning of Metals on Surfaces
A new method is presented for a single pulse laser patterning of metallic thin films. This process is used to form submicron… 
Highly Cited
2001
Highly Cited
2001
To appear in ApJ Letters Preprint typeset using L ATEX style emulateapj v. 14/09/00 THE OPTICALLY-POWERFUL QUASAR E1821+643 IS ASSOCIATED WITH A 300-KPC SCALE FR I RADIO STRUCTURE
  • 2001
  • Corpus ID: 16190255
1999
1999
Mapping Salutation architecture APIs to Bluetooth Service Discovery Layer
SLM-API function accomplished slmRegisterCapability() Input Parameters ( Functional Unit Description Record; Callback Entry for… 
1994
1994
Selective imaging of self-assembled monolayers by tunneling microscopy
The properties of thin organic films offer many challenging opportunities for science and technology. A crucial requirement for… 
1990
1990
Gasdynamics in interacting and merging galaxies
A three-dimensional model is developed for gas clouds orbiting in the gravitational potential of a galaxy which, at some later… 
Highly Cited
1970
Highly Cited
1970
Electrostatic Plasma Instabilities Excited by a High‐Frequency Electric Field
The electrostatic plasma waves excited by a uniform, alternating electric field of arbitrary intensity are studied on the basis… 
1968
1968
Aggressive behaviour of the harvester termitesHodotermes mossambicus (Hagen) andTrinervitermes trinervoides (Sjöstedt)
Summary1.Individual males, females and pairs of primary reproductives ofH. mossambicus developed strong aggressive reactions to… 
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