4955 search results - page 897 / 991 » Multiple Pattern Databases |
ICDT
1999
ACM
14 years 2 months ago
1999
ACM
Electronic newsgroups are one of the primary means for the dissemination, exchange and sharing of information. We argue that the current newsgroup model is unsatisfactory, especial...
SIGMOD
1997
ACM
14 years 2 months ago
1997
ACM
Computing multiple related group-bys and aggregates is one of the core operations of On-Line Analytical Processing (OLAP) applications. Recently, Gray et al. [GBLP95] proposed the...
VLDB
1997
ACM
14 years 2 months ago
1997
ACM
Query optimizers that explore a search space exhaustively using transformation rules usually apply all possible rules on each alternative, and stop when no new information is prod...
ICDE
1993
IEEE
14 years 2 months ago
1993
IEEE
To add time su port to the relational model, both first normal form (fNF and non-INF appmches have maining within 1NF when time support is added may introduce data redundancy. The...
VLDB
1994
ACM
14 years 2 months ago
1994
ACM
A new type of optimization, called predicate move-around, ia introduced. It is shown how this optimization `considerably improvea the efficiency of evaluating SQL queries that hav...