A collective term for databases other than relational databases, including key-value, document, column-oriented and graph types. Many products are easy to scale out across multiple servers and allow flexible data formats, but they are often poor at complex queries such as table joins and at strict consistency.
Japanese name: NoSQL
NoSQL appears in 2 practice questions across 1 topic, including Database Basics.
Field: Database Basics
Answer: C. It specializes in the simple operation of reading and writing a value by specifying its key and is easy to scale out across multiple servers, but it is not suited to complex queries such as table joins
NoSQL is a collective term for databases other than relational databases, including key-value, document, column-oriented (wide-column) and graph types. A key-value store saves pairs of a key (identifier) and a value and specializes in the simple operation of retrieving a value by specifying its key. Because data can easily be divided by key and distributed across multiple servers, it is used by web services with very heavy traffic, for example to store information about logged-in users (sessions). On the other hand, it is poor at searching by the contents of values and at complex queries such as table joins, so the application has to work around this. Many products also do not require the format of values to be strictly decided in advance (schemaless). Some products also allow eventual consistency, in which updates are not immediately reflected in all the distributed copies.
NoSQL is a collective term for databases other than relational databases, including key-value, document, column-oriented (wide-column) and graph types.
Among the databases called NoSQL, which is generally a corr…Many NoSQL products prioritize availability and adopt eventual consistency, in which the copies converge over time.
Which is an appropriate description of the CAP theorem for …As an Amazon Associate I earn from qualifying purchases.
ACID properties Database index Database view E-R diagram Foreign key Isolation level Normalization Primary key Relational database SQL