6650 search results - page 248 / 1330 » Mutating database queries |
151
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DEXA
2003
Springer
15 years 9 months ago
2003
Springer
: We demonstrate an approach to transform keyword queries automatically into queries that combine keywords appropriately by boolean operations, such as and and or. Our approach is ...
225
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ICDE
2004
IEEE
16 years 5 months ago
2004
IEEE
Queries with (equality or LIKE) selection predicates over string attributes are widely used in relational databases. However, state-of-the-art techniques for estimating selectivit...
125
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SIGMOD
2001
ACM
16 years 4 months ago
2001
ACM
The XQuery formalization is an ongoing effort of the W3C XML Query working group to define a precise formal semantics for XQuery. This paper briefly introduces the current state o...
132
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XIMEP
2004
ACM
15 years 10 months ago
2004
ACM
We give an overview on how XQuery processing works in our native XML database system Natix. After a brief description of the query compiler we focus on the aspect of join ordering...
121
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DBPL
1999
Springer
15 years 8 months ago
1999
Springer
We consider IES(SQL), the incremental evaluation system over an SQL-like language with grouping, arithmetics, and aggregation. We show that every second order query is in IES(SQL) ...