How do non relational databases store and retrieve data?

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A non-relational database stores data in a non-tabular form, and tends to be more flexible than the traditional, SQL-based, relational database structures. It does not follow the relational model provided by traditional relational database management systems.

How does a non-relational database work?

A non-relational database is a database that does not use the tabular schema of rows and columns found in most traditional database systems. Instead, non-relational databases use a storage model that is optimized for the specific requirements of the type of data being stored.

How are NoSQL databases stored?

Wide-column stores: Wide-column NoSQL databases store data in tables with rows and columns similar to RDBMS, but names and formats of columns can vary from row to row across the table. ... In an RDBMS, the data would be in different rows stored in different places on disk, requiring multiple disk operations for retrieval.

How do NoSQL stores and manage data?

Most NoSQL and NewSQL data stores implement some sort of horizontal partitioning or sharding, which involves storing sets or rows/records into different segments (or shards) which may be located on different servers.

How do relational databases store and retrieve data?

A relational database stores data in tables. Tables are organized into columns, and each column stores one type of data (integer, real number, character strings, date, …). The data for a single “instance” of a table is stored as a row.

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