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Bitmap-based COUNT(DISTINCT) Functions in Oracle 19c

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Oracle 19c provides a set of new SQL functions for bitmap operations. They allow fast computation of COUNT(DISTINCT) expressions. What is the purpose of these functions? The Oracle documentation is very sparse, but at least it tells us that the main … Mehr…

Lesen Sie den vollständigen Beitrag unter http://blog.trivadis.com/b/danischnider/archive/2019/04/20/bitmap-based-count-distinct-functions-in-oracle-19c.aspx


Bereitgestellt 20 Apr 2019 21:13 von triBLOG