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Data Warehousing refers to storage maintained electronically for huge information. Several organizations and businesses use this module to fetch historical data, transaction details, and for data mining purposes. Simply, it provides you a business intelligence against the most lengthy procedures.
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Query-driven Approach
Data Warehouse scenario-based questions
Types of dimensions in data warehouse
Data warehousing MCQs
Update driven Approach
Data loading
Data extraction
Data cleaning
Data loading and Data Refreshing
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It is necessary to keep the operational data free of any warehouse operations
It contains data derived from multiple sources
A data warehouse cannot afford to allow corrupted data within it
A data warehouse contains summarized data whereas the operational database contains transactional data
Answer:
A data warehouse contains summarized data whereas the operational database contains transactional data
ODS
Cleanroom Table
Staging Area
No distinct cleansing phase, data cleansed during MDX queries
Answer:
Staging Area