Explain the difference between an ETL developer and an ETL consultant. (if there is any differnce at all)?
If so who has more responsibilities?
For a customer update transaction it should be inserted in customer table as a new record or as a insert with a new surrogate key.
Latest Answer: Because bitmapped indexes map values in the column to bits and store only the bit values, storage is reduced by several orders when bitmapped indexes are used. ...
How can we insert column header in target files when there are no column headers after completing the transformations when we are trying to load into the target ?
Latest Answer: The datawarehousing where all the operations activities maintained, so that you can access the anaysed data from adifferent place.For example, take bank operations ... if A deposit 10,000/- in B account in Hyderabad  and B withdraw the money ...
I want result as eno ename salary dense_rank100 A 10000 1200 B 9000 2300 C 9000 2400
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