Data Mining is the analysis step of the "knowledge discovery in databases" process, or KDD. The term is a misnomer, because the goal is the extraction of patterns and knowledge from large amounts of data, not the extraction (mining) of data itself.
Big Data is a term for data sets that are so large or complex that traditional data processing applications are inadequate. Challenges include analysis, capture,data curation, search, sharing, storage, transfer, visualization, querying and information privacy
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