2145 search results - page 102 / 429 » Answering Queries Using Views |
162
Voted
SIGMOD
2007
ACM
16 years 3 months ago
2007
ACM
Date's popular critique of SQL's three-valued logic [4, 3] purports to demonstrate that SQL queries can produce erroneous results when nulls are present in the database....
121
Voted
TREC
2007
15 years 4 months ago
2007
This paper describes our experiments on TREC 2007 Genomics Track which is concerned with question answering extraction from full-text biomedical literatures. In our experiment, na...
126
Voted
DEXA
2006
Springer
15 years 5 months ago
2006
Springer
Geographic information systems (GIS) must support large georeferenced data sets. Due to the size of these data sets finding exact answers to spatial queries can be very time consum...
113
Voted
JFP
2006
15 years 3 months ago
2006
A part of a query that will never contribute data to the query answer should be regarded as an error. This principle has been recently accepted into mainstream XML query languages...
112
Voted
ICDT
1995
ACM
15 years 7 months ago
1995
ACM
A tuple t1 of relation R subsumes tuple t2 of R, with respect to a query Q if for every database, tuple t1 derives all, and possibly more, answers to query Q than derived by tuple ...