439 search results - page 63 / 88 » Unnesting Arbitrary Queries |
ER
2004
Springer
14 years 3 months ago
2004
Springer
Abstract. Past research work on modeling and managing temporal information has, so far, failed to elicit support in commercial database systems. The increasing popularity of XML oï...
SDMW
2004
Springer
14 years 3 months ago
2004
Springer
For many data providers, the âcrown jewelsâ of their business are the data that they have organized. If someone could copy their entire database, it would be a competitive cata...
VLDB
1998
ACM
14 years 2 months ago
1998
ACM
We propose a multi-dimensional language called nD-SQL with the following features: (i) nD-SQL supports queries that interoperate amongst multiple relational sources with heterogen...
CDB
1997
Springer
14 years 2 months ago
1997
Springer
We consider two-dimensional spatial databases deïŹned in terms of polynomial inequalities and investigate the expressibility of the topological connectivity query for these databa...
ICLP
1997
Springer
14 years 2 months ago
1997
Springer
Kowalski and Sergotâs Event Calculus (EC) is a simple temporal formalism that, given a set of event occurrences, derives the maximal validity intervals (MVIs) over which propert...