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Multiple Aggregations Over Data Streams

Multiple Aggregations Over Data Streams

Multiple Aggregations Over Data Streams. Rui Zhang National Univ. of Singapore Nick Koudas Univ. of Toronto Beng Chin Ooi National Univ. of Singapore Divesh Srivastava AT&T Labs-Research. Outline. Introduction Query example and Gigascope Single aggregation Multiple aggregations

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538 views • 43 slides
Multiple Aggregations Over Data Streams

Multiple Aggregations Over Data Streams

Multiple Aggregations Over Data Streams. Rui Zhang National Univ. of Singapore Nick Koudas Univ. of Toronto Beng Chin Ooi National Univ. of Singapore Divesh Srivastava AT&T Labs-Research. Outline. Introduction Query example and Gigascope Single aggregation Multiple aggregations

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533 views • 43 slides
Multiple Aggregations Over Data Streams

Multiple Aggregations Over Data Streams

Multiple Aggregations Over Data Streams. Rui Zhang National Univ. of Singapore Nick Koudas Univ. of Toronto Beng Chin Ooi National Univ. of Singapore Divesh Srivastava AT&T Labs-Research. Outline. Introduction Query example and Gigascope Single aggregation Multiple aggregations

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443 views • 43 slides
Dr . Panagiotis S ymeonidis Data Engineering Laboratory

Dr . Panagiotis S ymeonidis Data Engineering Laboratory

Data Warehouse implementation: Part B. Dr . Panagiotis S ymeonidis Data Engineering Laboratory. http://delab.csd.auth.gr/~symeon. Cuboids Materialization as an Optimization Problem. Minimize : the average time taken to evaluate a view Constraint : materialize a fixed number k of views

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545 views • 39 slides

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