The bronze table catalog.web.bronze_search stores an ARRAY<STRING> column tags on each search event. For tag-level analytics, the silver table needs one row per (event_id, tag) pair — an event carrying three tags becomes three rows. ```sql SELECT event_id, /* expression */ AS tag FROM catalog.web.bronze_search ``` Which expression produces one row per array element?
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Correct answer: explode(tags)
Reference: https://docs.databricks.com/aws/en/sql/language-manual/sql-ref-functions
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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): explode(tags)
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