4113 search results - page 306 / 823 » Watermarking Relational Databases |
178
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ICDT
2012
ACM
13 years 7 months ago
2012
ACM
A universal model of a database D and a set Σ of integrity constraints is a database that extends D, satisfies Σ, and is most general in the sense that it contains sound and co...
152
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VLDB
1987
ACM
15 years 8 months ago
1987
ACM
is at least ae powerful as SQL. Two well known relational query languages that have a sound theoretical foundation are relational algebra and relational calculus. As SQL is more cl...
175
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DBPL
1993
Springer
15 years 9 months ago
1993
Springer
In this paper we study the expressive power of query languages for nested bags. We de ne the ambient bag language by generalizing the constructs of the relational language of Brea...
253
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ICDE
2009
IEEE
16 years 6 months ago
2009
IEEE
Online approaches to physical design tuning have received considerable attention in the recent literature, with a focus on the problem of online index selection. However, it is dif...
242
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ICDE
2003
IEEE
16 years 6 months ago
2003
IEEE
There has been interest recently in skyline queries, also called Pareto queries, on relational databases. Relational query languages do not support search for "best" tupl...