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What is meant by NoSQL databases? Give a brief history of NoSQL databases and how they...

  1. What is meant by NoSQL databases? Give a brief history of NoSQL databases and how they are used today. Mention two commercial-grade NoSQL databases that are in use today.
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I will try to summarize NoSQL databases in points :

1) NoSQL databases are the databases which does not store data in tabular format. The word "NoSQL was first given by Carlo Strozzi in 1998.

2)The need for NoSQL database arise because of the large amount of data generated from internet and the relational database present were not flexible enough to accomodate such massive data.

3)The NoSQL database are mostly used in Big-data applications where data is not required to be organised in particular format and we do not often required to query from the data.

4)Commonly used NoSQL databases are MongoDB , Cassandra , Redis etc.

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