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    Posts

    Tag: correlation

    19.09.2018 | Laurenz Albe

    Correlation of PostgreSQL columns explained

    After you ANALYZE a PostgreSQL table to collect value distribution statistics, you will find the gathered statistics for each column in the pg_stats system view. This article will explain the meaning of the correlation column and its impact on index scans. Physical vs. logical ordering Most common PostgreSQL data types have an ordering: they support […]

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