902 search results - page 121 / 181 » Efficient and Extensible Algorithms for Multi Query Optimiza... |
148
click to vote
PODS
2002
ACM
16 years 21 days ago
2002
ACM
We consider the fundamental operation of applying a conjunction of selection conditions to a set of records. With large main memories available cheaply, systems may choose to keep...
169
click to vote
ICDE
1999
IEEE
16 years 1 months ago
1999
IEEE
Indexes play a vital role in decision support systems by reducing the cost of answering complex queries. A popular methodology for choosing indexes that is adopted by database adm...
191
Voted
SIGMOD
2008
ACM
16 years 21 days ago
2008
ACM
Supporting ranking queries in database systems has been a popular research topic recently. However, there is a lack of study on supporting ranking queries in data warehouses where...
203
Voted
SIGMOD
2006
ACM
16 years 21 days ago
2006
ACM
Given a dataset P and a preference function f, a top-k query retrieves the k tuples in P with the highest scores according to f. Even though the problem is well-studied in convent...
123
Voted
BMCBI
2006
15 years 19 days ago
2006
Background: Sequence comparison is one of the most prominent tools in biological research, and is instrumental in studying gene function and evolution. The rapid development of hi...