Approximately counting answers to conjunctive queries with disequalities and negations
We study the complexity of approximating the number of answers to a small query φ in a large database D. We establish an exhaustive classification into tractable and intractable cases if φ is a conjunctive query possibly including disequalities and negations: - If there is a constant bound on the ar...
| Hlavní autoři: | , , , |
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| Médium: | Conference item |
| Jazyk: | English |
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Association for Computing Machinery
2022
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