Secondary index in Cassandra

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What are secondary index in Cassandra ?
Aug 21, 2018 in Database by shams
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Secondary indexes are indexes built over column values. In other words, let’s say you have a user table, which contains a user’s email. The primary index would be the user ID, so if you wanted to access a particular user’s email, you could look them up by their ID. However, to solve the inverse query given an email, fetch the user ID requires a secondary index.
answered Aug 21, 2018 by kurt_cobain
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