Customers collapsed by alias mapping

Count distinct CustomerCode after trim and upper-case, then map alias codes to canonical codes through MapCustomerAlias and count again. How many codes collapsed?

Expected: Two counts and the difference · KPI card
Tables: FactDataPipelineEvents, MapCustomerAlias · columns

FactDataPipelineEvents
MapCustomerAlias

CustomerCode
AliasCode
Topics: Data Integration

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