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Upgrade to ProYou are a CRM Data Engineer at Marriott. The guest database has inconsistent loyalty data: some guests have NULL for loyalty_program, and many have an empty string '' for loyalty_tier instead of a meaningful value. The marketing team needs a clean, normalized view of every guest's loyalty status for campaign targeting.
You are a CRM Data Engineer at Marriott. The guest database has inconsistent loyalty data: some guests have NULL for loyalty_program, and many have an empty string '' for loyalty_tier instead of a meaningful value. The marketing team needs a clean, normalized view of every guest's loyalty status for campaign targeting.