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Data & Analytics · Advanced

Data Skipping

Using per-file min/max statistics to skip files that cannot contain rows matching a query filter.

Definition

Delta collects statistics on the first 32 columns by default. Clustering improves skipping because value ranges overlap less. It is the lakehouse equivalent of Snowflake micro-partition pruning.

Exam tip

Put frequently filtered columns among the first 32 columns, or configure stats collection, so Delta can skip files.

Related terms