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What is the difference between a primary index and a
secondary index? What is a duplicate data entry in an index?
Can a primary index contain duplicates?
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Answer Posted / sanjib sarkar
Index is a set of <KEY,ADDRESS> pair. Now in the case of
Primary Index both keys and addresses of the records are
kept in order to search a particular record faster but in
the case of Secondary Index only the addresses of the
records are kept in the index not the key.
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