Please explain me the difference between 3 types of slowly
changing dimension in datawarehousing?
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Answer Posted / sowmi
scd 1:It wont implement the new change.It always contains
the historic data alone.
scd 2:It will replace or overwrite the existing record.It
will not contain the historic data.But it has surrogate key.
scd 3:It contains both the old data and a new record with
the modified information and has additional columns like
"effective start date and end date" or "version no".
Please correct me if i am wrong
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