Survey on Query Estimation in Data Streams

Query estimation plays an important role in query optimization by choosing a particular query plan. Performing Query estimation becomes quite challenging in case of fast, continuous, online data streams. Different summarization methods like Sampling, Histograms, Wavelets, Sketches, Discrete cosine series etc. are used to store data distribution for query estimation. In this paper a brief survey of query estimation techniques in view of data streams is presented.

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