Oracle APPROX_COUNT_DISTINCT Function

Posted: June 8, 2016 | Author: | Filed under: Oracle, Oracle 12c, Uncategorized | Tags: , | Leave a comment

Some notes on the Oracle APPROX_COUNT_DISTINCT Function

The APPROX_COUNT_DISTINCT Function – A Test Case

Testing

http://externaltable.blogspot.co.uk/2014/08/scaling-up-cardinality-estimates-in.html

Scaling up Cardinality Estimates in 12.1.0.2

http://afatkulin.blogspot.co.uk/2013/11/hyperloglog-in-oracle.html

HyperLogLog in Oracle

Sketch of the Day: HyperLogLog — Cornerstone of a Big Data Infrastructure

HyperLogLog — Cornerstone of a Big Data Infrastructure

 

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ORA-14696: MAX_STRING_SIZE migration is incomplete for pluggable database

Posted: April 30, 2015 | Author: | Filed under: Oracle, Oracle 12c | Tags: , | Leave a comment

http://www.liberidu.com/blog/2013/12/24/ora-14696-max_string_size-migration-is-incomplete-for-pluggable-database/

ORA-14696: MAX_STRING_SIZE migration is incomplete for pluggable database