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Answer Posted / a g srikanth
Bitmap Index is an index that can be used on low
cardinality columns with a large number of rows. Low
cardinality columns are the ones with less number of
distinct values (eg.gender columns with just two distinct
values Male & Female).
Bitmap indexes are also useful in DWH applications where a
large table is joined with many small tables in a
denormalized star schema.
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