Computer Science · Data Warehousing
In a data warehousing project for portfolio performance tracking, the team encounters varying client address formats from legacy systems. Conceptually, at which ETL stage should address standardization occur to optimize downstream analytical accuracy without redundant processing?
- 1Post-warehouse, via periodic metadata updates
- 2During loading, as a validation check post-import
- 3During query execution, using dynamic parsing
- 4During transformation, as a cleansing step before loading✓
Correct answer
During transformation, as a cleansing step before loading
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