Tag Archives: SORT AGGREGATE APPROX

APPROX_COUNT_DISTINCT in Oracle 12c.

Most of time during performance analysis to understand Stale stats, we usually need to check estimated NDV (Number of Distinct values). If data-set is huge , it take considerable time to project desired output using traditional COUNT(DISTINCT) appraoch. For any … Continue reading

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Posted in Oracle 12c New Features, Oracle Internal, Oracle Performance | Tagged , , , | Leave a comment