WGU D191 Exam Study Guide/ (Top 2024/2025 EXAM REVIEW PAPERS / GRADED A+/ 100% Accurate)

WGU D191 Exam Study Guide What is a one-line explanation of ETL and each subsequent step? - Extract, transform, load = data integration EXTRACT: Data from external/operational sources TRANSFORM: clean data into appropriate format LOAD: Put data into repo What are the basics of the EXTRACT step? -Connect to source systems by selecting/collecting data for analytical purposes within the data mart. Usually this involves consolidation. Must also convert data into a format that is suitable for transformation What are the basics of the TRANSFORM step? - Executes a series of rules/functions to the data to convert it to a standard format. Data validation/rejection happens here Data quality influences how much transformation is needed In the TRANSFORM step, what are the most common processes/conversions? -Most common processes are conversion, clearing duplicates, standardizing, filtering, sorting and translating/looking up/verifying data What are the basic steps of the LOAD(ING) process? -