Not Only SQL databases, shortened to NoSQL, store data differently than relational tables. NoSQL databases come in a variety of types based on their data model. The main types are document, key-value, wide-column, and graph. They provide flexible schemas and scale easily with large amounts of data and high user loads.

Metadata describes data, but it is not the data itself. Author, creation date, modification date and file size are examples of very basic document file metadata.

Sentiment analysis, or opinion mining, is an NLP technique used to determine whether data is positive, negative or neutral in texts. It can be used, for example, by businesses to gauge brand reputation, customers understanding, and so on.

Artificial Intelligence