Question
Surrogate keys are used in data warehouses because:
More Data Warehousing Questions
- Which of the following is NOT a characteristic of OLAP systems?
- In a data cube, what does "slice" operation do?
- Which type of slowly changing dimension (SCD) preserves full history by adding a new row for each change and using effective date ranges?
- What is a 'star schema' in data warehouse design?
- Which clause is used to sort the results in SQL?
- ETL stands for:
- Data warehouse metadata primarily describes:
- What does "drill-down" operation in OLAP do?
- Which type of schema uses a central fact table connected to dimension tables?
- Which of the following commands is part of the Transaction Control Language (TCL) in SQL?
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