13 June 2018 Hits: 1588. NoSQL stands in opposition to relational (SQL) databases that were de facto standard for a few decades. These are used for large sets of distributed data. Types of NoSQL Databases . Wide Column Stores — Cassandra and HBase. So what is a NoSQL database? These types of databases are optimized specifically for applications that require large data volume, low latency, and flexible data models, which are achieved by relaxing some of the data consistency restrictions of other databases. Key-value databases enable you to store data in pairs containing a unique ID and a data value. There are various types of databases used for storing different varieties of data: 1) Centralized Database. In the previous article, I had covered the different types of databases.Before reading this, please go through the previous article here.This will give you a complete overview of databases and different types. NoSQL is a term for a varied collection of modern database types that offer approaches that differ from the standard relational pattern. Supports variable sets of columns (column families) and is optimized for column‐wide operations (such as count, sum, and mean average). Graph databases — Neo4J and HyperGraphDB. Examples: Cassandra, Azure, LevelDB, and Riak. NoSQL databases: modern alternatives for data that doesn't fit the relational paradigm. Document databases — MongoDB. NoSQL databases use a variety of data models for accessing and managing data. 7. Each document has … Types of NoSQL Databases. NoSQL is simply the term that is used to describe a family of databases that are all non-relational. Document-based databases store the data in JSON objects. Exploring the Different Types of NoSQL Databases Part ii In our previous post titled ‘Just Say Yes to NoSQL’, we cited the CAP theorem, did a point-by-point comparison between RDBMS and NoSQL and explored in-depth, the various characteristics of NoSQL which make it the most reliable database solution available today. It is the type of database that stores data at a centralized database system. NoSQL Database. The words to the right hand side are examples of the types of NoSQL database types. Every single item in a key value database is stored as an attribute name (or "key") together with its value. There are certain big data performance problems that are handled effectively by relational databases, and NoSQL databases can easily address such problems. In this article we’ll take a high leve l look at the motivations behind ‘NoSQL’ databases, and three of the most common categories of NoSQL database in use today. MongoDB, CouchDB, CouchBase are document-oriented NoSQL databases, Redis and Riak are key-value stores, Cassandra and HBase are column family stores and Neo4J is a graph database. Types of NoSQL databases. It comforts the users to access the stored data from different locations through several applications. The CAP Theorem states that it is impossible to provide all three capabilities simultaneously. While the technologies, data types, and use cases vary wildly amount them, it is generally agreed that there are four types of NoSQL databases: Key-value stores – These databases … NoSQL… Lets discuss these types of databases in detail. Documents can contain key-array pairs or key-value pairs or even nested documents. Column store—or, wide-column store, which stores data tables as columns rather than rows. 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