Question
In a star schema, what is the main advantage of using surrogate keys in fact tables?
More Data Warehousing Questions
- Data cleansing is primarily concerned with:
- Which SQL clause is used to filter records after aggregation?
- Data warehouse metadata primarily describes:
- A surrogate key is:
- Which schema uses multiple fact tables sharing dimension tables?
- Which OLAP operation summarizes data along a dimension?
- Which SQL function returns the total number of rows in a table?
- What is meant by 'cardinality' in data modeling?
- Which OLAP operation rotates the data axes to provide an alternative presentation?
- What is the result of SELECT COALESCE(NULL, NULL, 5, 10);?
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