What are the stages of datawarehousing?
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What Oracle features can be used to optimize my Warehouse system?
What is the difference between datawarehouse and bi?
What is surrogate key? Where we use it? Explain with examples.
What is ods (operation data source)?
What are the different types of data warehouses?
How do you define data block size?
Explain what is the main difference between inmon and kimball philosophies of data warehousing?
What is pre-emptive and non-pre-emptive?
What are Data Marts?
Which one among Star and snowflake schemas will occupy more space?
Explain er diagram?
What is an error log table in informatica occurs and how to maintain it in mapping?