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CORR
2010
Springer
168views Education» more  CORR 2010»
15 years 5 months ago
Adding HL7 version 3 data types to PostgreSQL
The HL7 standard is widely used to exchange medical information electronically. As a part of the standard, HL7 defines scalar communication data types like physical quantity, poin...
Yeb Havinga, Willem Dijkstra, Ander de Keijzer
CIKM
2009
Springer
15 years 10 months ago
Generating SQL/XML query and update statements
The XML support in relational databases and the SQL/XML language are still relatively new as compared to purely relational databases and traditional SQL. Today, most database user...
Matthias Nicola, Tim Kiefer
ICDT
2012
ACM
251views Database» more  ICDT 2012»
13 years 9 months ago
Computing universal models under guarded TGDs
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...
André Hernich
VLDB
1987
ACM
108views Database» more  VLDB 1987»
15 years 10 months ago
Translating and Optimizing SQL Queries Having Aggregates
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...
Günter von Bültzingsloewen
DBPL
1993
Springer
141views Database» more  DBPL 1993»
15 years 11 months ago
Some Properties of Query Languages for Bags
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...
Leonid Libkin, Limsoon Wong