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Null (SQL)
Known as:
Sql case
, NULLIF
, C-table
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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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ACM Transactions on Database Systems
Aggregate function
B-tree
Check constraint
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Papers overview
Semantic Scholar uses AI to extract papers important to this topic.
Review
2009
Review
2009
A Survey on the Management of Uncertain Data
Zhou Ao
2009
Corpus ID: 63993461
The importance of the data uncertainty was studied deeply with the rapid development in data gathering and processing in various…
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2007
2007
Undocumented and Hard-to-find PROC SQL ® Features
K. Lafler
2007
Corpus ID: 15798421
The SQL Procedure contains many powerful and elegant language features for SQL users. This paper presents SQL topics that will…
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2007
2007
Advanced Online Moisture Measurements in Power Transformers
M. Koch
,
S. Tenbohlen
,
T. Stirl
2007
Corpus ID: 49215814
This paper investigates new approaches to determine water in oil-paper-insulated power transformers. Moisture diffusion and…
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2004
2004
Buffer Layer Assisted Laser Patterning of Metals on Surfaces
G. Kerner
,
M. Asscher
2004
Corpus ID: 21720841
A new method is presented for a single pulse laser patterning of metallic thin films. This process is used to form submicron…
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2002
2002
Electrochemical Impedance Spectroscopy Study of the Nucleation and Growth of Apatite on Chemically Treated Titanium
C.-X. Wang
,
Min Wang
,
Xing-Gui Zhou
2002
Corpus ID: 9567547
Bonelike apatite formed on the surface of titanium pretreated with NaOH solution after having been immersed in simulated body…
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1999
1999
Mapping Salutation architecture APIs to Bluetooth Service Discovery Layer
B. Miller
,
R. Pascoe
1999
Corpus ID: 59702776
SLM-API function accomplished slmRegisterCapability() Input Parameters ( Functional Unit Description Record; Callback Entry for…
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1994
1994
Selective imaging of self-assembled monolayers by tunneling microscopy
J. Bucher
,
L. Santesson
,
K. Kern
1994
Corpus ID: 56006184
The properties of thin organic films offer many challenging opportunities for science and technology. A crucial requirement for…
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1991
1991
A study of achievable speedup in distributed simulation via NULL messages
Devendra Kumar
,
S. Harous
[ Proceedings] Tenth Annual International Phoenix…
1991
Corpus ID: 39264407
The authors report the results of an experimental study on distributed simulation of two open queueing networks. The distributed…
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1989
1989
Compatability of timber salvage operations with watershed values
R. Poff
1989
Corpus ID: 113677485
Timber salvage on the Indian Burn was carried out without compromising watershed values. In some cases watershed condition was…
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1968
1968
Multiple Collinear Laser-produced Sparks in Gases
L. Evans
,
C. G. Morgan
Nature
1968
Corpus ID: 4178638
THERE has been much interest in the recently reported1–4 ionization and breakdown in gases induced by the focused output (∼ 20 MW…
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