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A dichotomy in the intensional expressive power of nested relational calculi augmented with aggregate functions and a powerset operator.
Limsoon Wong
Published in:
PODS (2013)
Keyphrases
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nested relational
aggregate functions
expressive power
relational algebra
query language
transitive closure
data complexity
first order logic
relational calculus
recursive queries
query evaluation
data integration
aggregate queries
data model
relational model
relational database systems