Wgu d191 exam study guide - Study guides, Class notes & Summaries

f 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 s...

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...

Which three events can activate a trigger? - INSERT UPDATE DELETE Which operator is used in a WHERE clause when the subquery returns more than one row of data? - IN ALL ANY Which statement accurately describes how jobs are scheduled in PostgreSQL? - The pgAgent is a job scheduling agent available for PostgreSQL What must be completed during the extract step in the ETL process? - The first step, extraction, is to collect or grab data from from its source(s). The second step, transfo...

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