The bronze table catalog.crm.bronze_contacts stores two email columns. primary_email is frequently NULL, and some of those rows have a usable secondary_email. The silver view must expose a single column contact_email that returns primary_email when it is not NULL, otherwise secondary_email, and otherwise the literal 'no-email@company.com'. ```sql SELECT customer_id, /* expression here */ AS contact_email FROM catalog.crm.bronze_contacts ``` Which expression implements this fallback logic?
Reveal answer
Correct answer: COALESCE(primary_email, secondary_email, 'no-email@company.com')
Reference: https://docs.databricks.com/aws/en/sql/language-manual/sql-ref-functions
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Official Answer (C): COALESCE(primary_email, secondary_email, 'no-email@company.com')
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