A query language and optimization techniques for unstructured data
نویسندگان
چکیده
منابع مشابه
AQuery: Query Language for Ordered Data, Optimization Techniques, and Experiments
An order-dependent query is one whose result (interpreted as a multiset) changes if the order of the input records is changed. In a stock-quotes database, for instance, retrieving all quotes concerning a given stock for a given day does not depend on order, because the collection of quotes does not depend on order. By contrast, finding a stock’s fiveprice moving-average in a trades table gives ...
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ژورنال
عنوان ژورنال: ACM SIGMOD Record
سال: 1996
ISSN: 0163-5808
DOI: 10.1145/235968.233368