RDBMS 和 MongoDB 的区别

什么是MongoDB?
MongoDB 是一个开源的面向文档的数据库，用于大容量数据存储。它属于 NoSQL 数据库的分类。 NoSQL 工具意味着它不使用通常的行和列。 MongoDB 使用 BSON(文档存储格式)，它是 JSON 文档的二进制样式。

MongoDB的特点：

• 多服务器：它可以在多台服务器上运行。
• 无模式数据库：它是一个无模式数据库。
• 索引：文档中的任何字段都可以被索引。
• 富对象模型：支持丰富的对象模型。

什么是关系型数据库?
它代表关系数据库管理系统。它以相关表的形式存储数据。

关系型数据库的特点：

• 提供高水平的信息安全。
• 它快速而精确。
• 提供设施主键，对行进行异常区分。

RDBMS 和 MongoDB 的区别：

RDBMS	MongoDB
It is a relational database.	It is a non-relational and document-oriented database.
Not suitable for hierarchical data storage.	Suitable for hierarchical data storage.
It is vertically scalable i.e increasing RAM.	It is horizontally scalable i.e we can add more servers.
It has a predefined schema.	It has a dynamic schema.
It is quite vulnerable to SQL injection.	It is not affected by SQL injection.
It centers around ACID properties (Atomicity, Consistency, Isolation, and Durability).	It centers around the CAP theorem (Consistency, Availability, and Partition tolerance).
It is row-based.	It is document-based.
It is slower in comparison with MongoDB.	It is almost 100 times faster than RDBMS.
Supports complex joins.	No support for complex joins.
It is column-based.	It is field-based.
It does not provide JavaScript client for querying.	It provides a JavaScript client for querying.
It supports SQL query language only.	It supports JSON query language along with SQL.