MongoDB for Beginners: Complete Process from Installation to Querying

MongoDB is a popular document - oriented database that stores data in BSON format similar to JSON. It has a flexible schema without fixed table structures, making it suitable for unstructured or semi - structured data. With a low learning curve, it is ideal for rapid development. Installation is supported on Windows, macOS, and Linux: For Windows, install via the official MSI installer and add environment variables; for macOS, use Homebrew; for Linux (Ubuntu), install via the apt source. Verification is required for all, which can be done by executing `mongo` or `mongosh`. Core concepts: A database corresponds to a "library", a collection corresponds to a "table", and a document is the smallest data unit (e.g., `{"name":"张三",...}`). Basic operations: Use `use 数据库名` to connect and switch databases; insert a single data entry with `db.集合.insertOne({...})`; query with `find()` (with conditions like `age>20`); update with `updateOne(condition, {$set:{field}})`; delete with `deleteOne(condition)`. Practice is crucial. It can be combined with code operations. For advanced usage, one needs to learn aggregation queries and index optimization, and refer to the official documentation.