2514 search results - page 297 / 503 » On the Computation of Approximations of Database Queries |
159
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ICDT
1997
ACM
15 years 11 months ago
1997
ACM
We develop a new schema for unstructured data. Traditional schemas resemble the type systems of programming languages. For unstructured data, however, the underlying type may be mu...
142
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SIGMOD
2010
ACM
15 years 7 months ago
2010
ACM
In this paper we investigate techniques that allow for on-line updates to columnar databases, leaving intact their high read-only performance. Rather than keeping differential str...
199
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PPDP
2010
Springer
15 years 4 months ago
2010
Springer
Given a set of Datalog rules, facts, and a query, answers to the query can be inferred bottom-up starting with the facts or top-down starting with the query. For efficiently answe...
194
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SIGMOD
1997
ACM
15 years 11 months ago
1997
ACM
A range query applies an aggregation operation over all selected cells of an OLAP data cube where the selection is speci ed by providing ranges of values for numeric dimensions. W...
189
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VLDB
1987
ACM
15 years 10 months ago
1987
ACM
is at least ae powerful as SQL. Two well known relational query languages that have a sound theoretical foundation are relational algebra and relational calculus. As SQL is more cl...