SQL DatabaseNoSQL Database (MongoDB) Relational database Non-relational database Supports SQL query language Supports JSON query language Table based Collection based and key-value pair Row based Document based Column based Field based Support foreign key No support for foreign key Support for ...
NoSQL数据库代表“不仅仅是SQL”或“不是SQL”。虽然NoRELNoSQL会是一个更好的名词。Carl Strozz在1998年引入了NoSQL概念。 传统的RDBMS使用SQL语法来存储和查询数据。 相反,NoSQL数据库系统包含可存储结构化,半结构化,非结构化和多态数据的多种数据库技术。 为什么使用NoSQL? NoSQL数据库的概念在处理大量数据的...
MongoDB provides asynchronous replication. In such a setup only one database node is in charge ofwrite operationsat any given time (called primary server/node).Read operationsmay go to this same server for strong consistency semantics or to any of its replica peers if eventual ...
Where in we can relate data based on some existing data. Key-Value stores : These are the simplest NoSQL databases. In this each is stored with a key to identify it. In some Key-value databases, we can even save the typr of the data saved along, like in Redis. Wide-column stores...
Database Relational database Nonrelational database Language Structured query language (SQL) JSON query language Document structure Table based Collection based (Key–Value pair) Row based Document based Column based Field based Key support Foreign key No support for foreign key Triggers Support for ...
NoSQL databases comes in many types, for example: Document type: JSON documents Key-value: Key-value pairs Wide-column: Wide-column data store has tables with rows and dynamic columns Example of SQL based databases are MySQL, Microsoft SQL Server, PostgreSQL, and SQLite. NoSQL database ...
Four main types of NoSQL databases: document, key-value, wide column, and graph database Easy ingestion and processing of unstructured data and semi-structured data (e.g., documents, videos, photos), as well as structured data since no predefined schema is required Greater resiliency as functi...
3. 列族存储(Column-Family Store) 特点:数据以列的方式存储,每一行可以包含不同数量的列,列数据按列族存储。可用于大规模数据分布式存储。 优点:可以高效地处理大规模数据,支持水平扩展,查询特定列族数据速度快。 缺点:数据结构较为复杂,不适合频繁更新和复杂查询。
Graph Database其他的例子还有如：Infinite Graph,OrientDB,FlockDB ,TAO个人还是很看好NoSQL的前景的，...
MongoDB is a cross-platform document-based NoSQL database. It uses JSON/BSON like documents with schema. MongoDB stores data in flexible, JSON-like documents, meaning fields can vary from document to document and data structure can be changed over time. The document model maps to the objects...