Comparing real-time cardinality to the optimizer cardinality estimates

(Samir Kapoor, Sudharsan Selvarajah and Kaarel Truuvert) Evaluating real time cardinality in IBM DB2 Universal Database (DB2 UDB) versus the estimated cardinality in the access plan can help DBAs make various decisions to improve query performance. Here are all the details to create count queries to

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Comparing real-time cardinality to the optimizer cardinality estimates

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