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統計クエリQ is much used to aggregate across large datasets. For these examples, we will use simple aggregators (max, min, avg) and concentrate on doing complex things in the by-clause. One of the most powerful features of q is its ab
KDB and q documentation "Q for quants"の和訳①
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Kdb+ is a powerful database that can be used for streaming, real-time and historical data. Q is the SQL-like, general-purpose programming language built on top of kdb+. It offers high-performance, in-database analytic capabilities.
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