DP-900 · Question #170
Drag and Drop Question Your company plans to load data from a customer relationship management (CRM) system to a data warehouse by using an extract, load, and transform (ELT) process. Where does…
The correct answer is The CRM system; The data warehouse; The data warehouse. In an ELT (Extract, Load, Transform) process, the three stages map as follows: Extract occurs at the source system (the CRM system), where raw data is pulled directly from the operational database. Load and Transform both occur at the data warehouse - data is first loaded into…
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- The CRM system
- The data warehouse
- The data warehouse
Explanation
In an ELT (Extract, Load, Transform) process, the three stages map as follows: Extract occurs at the source system (the CRM system), where raw data is pulled directly from the operational database. Load and Transform both occur at the data warehouse - data is first loaded into the warehouse in its raw form, and then transformation (cleaning, reshaping, aggregating) happens inside the data warehouse using its own processing power. This contrasts with ETL, where transformation happens in a separate staging/middleware tool before loading.
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