PODS
2002
ACM
14 years 4 months ago
2002
ACM
Data Warehousing and OLAPapplications typically view data as having multiple logical dimensions e.g., product, location with natural hierarchies de ned on each dimension. OLAP que...
PODS
2002
ACM
14 years 4 months ago
2002
ACM
Research on information extraction from Web pages (wrapping) has seen much activity in recent times (particularly systems implementations), but little work has been done on formal...
PODS
2002
ACM
14 years 4 months ago
2002
ACM
PODS
2002
ACM
14 years 4 months ago
2002
ACM
PODS
2002
ACM
14 years 4 months ago
2002
ACM
PODS
2002
ACM
14 years 4 months ago
2002
ACM
PODS
2002
ACM
14 years 4 months ago
2002
ACM
PODS
2002
ACM
14 years 4 months ago
2002
ACM
PODS
2002
ACM
14 years 4 months ago
2002
ACM
We study two classes of view update problems in relational databases. We are given a source database S, a monotone query Q, and the view Q(S) generated by the query. The first pro...
PODS
2002
ACM
14 years 4 months ago
2002
ACM
We consider conjunctive queries with arithmetic comparisons over multiple continuous data streams. We specify an algorithm for determining whether or not a query can be evaluated ...