It d191 - Study guides, Class notes & Summaries

WGU D191 Task 1 Updated 2024 with complete solution WGU D191 Task 1 Updated 2024 with complete solution WGU D191 Task 1 Updated 2024 with complete solution VDM1 TASK 1

WGU D191 Advanced Data Management Comprehensive Test WGU D191 Advanced Data Management Comprehensive Test what is important about non-aggregate columns in reference to the GROUP BY clause? - ANSWER - non-aggregate fields must always be included in the GROUP BY clause; otherwise SQL interpreter will return an error (it will not know how to group the results) GROUPING SETS - ANSWER - SQL keyword that is a better alternative to UNION ALL statements syntax for GROUPING SETS - ANSWER - SELE...

WGU D191 - Advanced Data Management (SQL) || Questions & Answers (Rated A+) WGU D191 - Advanced Data Management (SQL) || Questions & Answers (Rated A+) to combine Rows from tables based on a match condition - ANSWER - primary purpose of a JOIN is: returns a single value (scalar) or Row set that is immediately available for use in the Outer query - ANSWER - A subquery: Returns a distinct list of Rows from both tables. like a Logical OR would do... - ANSWER - UNION operator Returns AL...

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...

WGU D191 Exam With 100% Correct Answers 2023 -d flag Specifies the database name in the psql command. -h flag Specifies the hostname of the database in the psql command. -p flag Specifies the database port in the psql command. ANALYZE command Collects statistics about tables and indices and stores them in internal tables. boolean A data type used to represent true or false. COPY command Transfers data from a database to a file, or from a file to a databa...

WGU D191 terms Questions and Answers graded A+ -d flag Specifies the database name in the psql command. -h flag Specifies the hostname of the database in the psql command. -p flag Specifies the database port in the psql command. ANALYZE command Collects statistics about tables and indices and stores them in internal tables. boolean A data type used to represent true or false. COPY command Transfers data from a database to a file, or from a file to a data...