What is surrogate key? Explain with examples.
What is VLDB?
What is analytical or analytic mean?
Explain me what is vldb?
What is called data cleaning?
Why null values are mapped as 0 in fact tables?
Define Data Warehousing?
What is Conceptual, Logical and Physical model?
Why facts table is useful in representing the data?
Explain the importance of data warehouse?
How do you define data block size?
what is query optimizer? what are different types of optimizer s supported by oracle ?
What is the difference between narmal load and bulk load?