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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

50 relations
ACM Transactions on Database SystemsAggregate functionB-treeCheck constraint

Papers overview

Semantic Scholar uses AI to extract papers important to this topic.
Highly Cited
2014
Highly Cited
2014
Sites of Playful Engagement: Twitter Hashtags as Spaces of Leisure and Development in Kenya
Through an analysis of popular Kenyan hashtags on Twitter, we argue that everyday leisure and entertainment practices interact… 
Highly Cited
2007
Highly Cited
2007
API Quality by Design Example from the Torcetrapib Manufacturing Process
The concept and application of quality by design (QbD) principles has been and will undoubtedly continue to be an evolving topic… 
Highly Cited
2006
Highly Cited
2006
Population and Diversity: Policy Implications of Emerging Indigenous Demographic Trends
There is a compelling need for fresh perspective on the policy implications of Indigenous demographic trends. Current frameworks… 
2006
2006
Time-frequency method for detecting an accelerating target in sea clutter
The authors design a time-frequency (TF) method for use in high-frequency surface-wave radar (HFSWR) for detecting a small… 
Review
2004
Review
2004
A framework to review the information integration of the enterprise
Organizations face the challenging task of integrating their distributed organizational units, information systems, and business… 
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
Highly Cited
1999
Highly Cited
1999
Multipulse operation of a Ti:sapphire laser mode locked by an ion-implanted semiconductor saturable-absorber mirror
We show results obtained from a semiconductor saturable-absorber mirror mode-locked Ti:sapphire soliton laser that was operated… 
Highly Cited
1999
Highly Cited
1999
Chemical Effects of Methyl and Methyl Ester Groups on the Nucleation and Growth of Vapor-Deposited Aluminum Films
The interaction of vapor-deposited Al atoms with self-assembled monolayers (SAMs) of HS(CH2)15- CH3 and HS(CH2)15CO2CH3… 
Highly Cited
1992
Highly Cited
1992
The extraction by soil and absorption by plants of applied zinc and cadmium
In five consecutive years lettuce, spinach, spring wheat, endive and maize were grown in pots and the effects of ‘native’ and… 
Highly Cited
1992
Highly Cited
1992
Exaggerated Texture and Grain Growth in a Supperplastic SiAlON
This paper reports on a fine-grained superplastic [beta]-silicon nitride solid solution (SiAlON) which was found to develop… 
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