708 search results - page 21 / 142 » Optimizing SQL Queries over Text Databases |
VLDB
1994
ACM
13 years 11 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...
SIGMOD
2007
ACM
14 years 7 months ago
2007
ACM
Incomplete information arises naturally in numerous data management applications. Recently, several researchers have studied query processing in the context of incomplete informat...
IDEAS
2002
IEEE
14 years 13 days ago
2002
IEEE
Boolean expression simplification is a well-known problem in the history of Computer Science. The problem of determining prime implicates from an arbitrary Boolean expression has...
EDBT
2004
ACM
14 years 7 months ago
2004
ACM
The join operation, which combines tuples from multiple relations, is the most fundamental and, typically, the most expensive operation in database queries. The standard approach t...
BNCOD
2007
13 years 9 months ago
2007
Order is essential for XML query processing. Efficient XML processing with order consideration over relational storage is non-trivial, especially for complex nested XQuery expressi...