Author: Zen and the Art of Computer Programming
1 Introduction
NoSQL (Not Only SQL) database is a non-relational database. Compared with relational databases, it is more flexible and can store massive amounts of data. Compared with traditional relational databases, NoSQL databases do not require pre-designed table structures and do not have a fixed query language. This means that developers can freely choose the database model and flexibly distribute data on different nodes while ensuring data consistency. NoSQL database has become one of the important tools in the field of cloud computing and big data analysis. Many companies are conducting big data analysis based on NoSQL database. This article will introduce how to use MongoDB as a NoSQL database, as well as the principles and processes of some common operations.
2. Explanation of basic concepts and terms
2.1 Document Databases
First we need to clarify what is a document database?
Document database refers to a class of database management systems that use JSON-like documents as their data structure and provides query and indexing capabilities based on the structure of those documents. The documents in these types of databases are analogous to records or rows in relational databases, but unlike traditional RDBMSs, they do not have predefined schemas or tables. Instead, document databases provide flexibility by allowing developers to