Course introduction - CS 591 K1: Data Stream Processing and Analytics Spring 2020surged by more than 300%. • Find all stocks trading above their 200-day moving average with a market cap greater than $5 Billion that have gained in price today by at least 2%, and are within 2% of0 码力 | 34 页 | 2.53 MB | 1 年前3- Streaming languages and operator semantics - CS 591 K1: Data Stream Processing and Analytics Spring 2020FROM empl GROUP BY DeptNo HAVING SUM(empl.Sal) > 10000 The introduction of a new empl can only expand the set of departments that satisfy this query However this sum query cannot be expressed without0 码力 | 53 页 | 532.37 KB | 1 年前3
- Cardinality and frequency estimation - CS 591 K1: Data Stream Processing and Analytics Spring 2020indication of what is “trending” Motivating examples ??? Vasiliki Kalavri | Boston University 2020 19 • Expand the classical BF with an array of m counters corresponding to each of the m bits in the filter:0 码力 | 69 页 | 630.01 KB | 1 年前3
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