Original link: https://www.lifengdi.com/archives/transport/technology/3986
1. Introduction In the previous article, we introduced the configuration and use of MongoDB in detail. If you don’t know much about MongoDB, it doesn’t matter. There are three more important terms in MongoDB: database, collection, document! Database: Like relational databases, each database has its own user permissions, and different project groups can use different database collections: Collections refer to document groups (similar to the concept of tables in Mysql ), which can store many documents (Document): Document is the most basic data unit in MongoDB, consisting of key-value pairs, similar to JSON format, […]
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