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Data & Analytics · Advanced

Change Data Feed (CDF)

A Delta Lake feature that records row-level inserts, updates and deletes between table versions so downstream jobs can process only changes.

Definition

CDF is enabled with delta.enableChangeDataFeed = true and read with table_changes() or the readChangeFeed option. Rows include _change_type, _commit_version and _commit_timestamp.

Example

SELECT * FROM table_changes('silver.customers', 5);

Exam tip

Propagating updates and deletes from silver to gold incrementally = Change Data Feed.

Related terms