NoSQL databases (aka " not only SQL ") are non-tabular, and 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. 4 major types of NoSQL databases emerged: Document databases Store data in documents similar to JSON (JavaScript Object Notation) objects. Each document contains pairs of fields and values. The values can typically be a variety of types including things like strings, numbers, booleans, arrays, or objects Their structures typically align with objects developers are working within code. A powerful query languages Horizontally scale-out to accommodate large data volumes. MongoDB is consistently ranked as the world’s most popular NoSQL database according to DB-engines and is an example of a document database. Key-...
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