A data engineer schedules this statement as the single task of a nightly Lakeflow Job. The source folder accumulates Parquet files throughout the day: ```sql COPY INTO main.ops.bookings_raw FROM 'abfss://landing@storacct.dfs.core.windows.net/bookings/' FILEFORMAT = PARQUET; ``` What happens on a night when no new files have arrived since the last successful run?
Reveal answer
Correct answer: The statement completes successfully and loads zero rows, because files that were already loaded by previous runs are skipped
Reference: https://docs.databricks.com/aws/en/ingestion/cloud-object-storage/copy-into
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02 — The Myelin Layer · Canonical Discussion
Where the exam tries to trick you — and how those who passed solved it.
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Official Answer (A): The statement completes successfully and loads zero rows, because files that were already loaded by previous runs are skipped
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