What's unstructured data, and how it works .
Unstructured data is a generic label for describing data that is not contained in a database or some other type of data structure. Unstructured data can be textual or non-textual. Textual unstructured data is generated in media like email messages, PowerPoint presentations, Word documents, collaboration software and instant messages. Non-textual unstructured data is generated in media like JPEG images, MP3 audio files and Flash video files.
Mongdb and Hbase are two systems for unstructured data.
https://www.mongodb.com/scale/unstructured-data-in-big-data
https://hbase.apache.org/poweredbyhbase.html
And there is a new concept, NoSQL:
https://www.mongodb.com/nosql-explained
A NoSQL (often interpreted as Not only SQL) database provides a mechanism for storage and retrieval of data that is modeled in means other than the tabular relations used in relational databases. Motivations for this approach include simplicity of design, horizontal scaling, and finer control over availability.
http://nosql-database.org/
Mongodb is a NoSQL database. And it is for unstructured data.
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