FastAPI + SQLite: Quickly Build a Lightweight Database API Service

This article introduces the process of quickly building a "Student Information Management" database API service using FastAPI and SQLite. First, dependencies such as FastAPI, Uvicorn, and SQLAlchemy are installed via `pip`. SQLAlchemy's ORM is used to define student data models (including id, name, and age fields) and session management, with Pydantic models for data validation. The core implementation includes CRUD operations (create, read single/all students, update, delete). FastAPI routes bind HTTP methods (POST/GET/PUT/DELETE) to generate student management API endpoints. The database configuration uses SQLite, an embedded database that requires no additional server, with data stored in the `test.db` file. After starting the service with Uvicorn, FastAPI automatically generates Swagger UI documentation for easy testing. This lightweight and easy-to-use solution supports asynchronous operations, making it suitable for small-to-medium projects. Future expansions include multi-table associations or migration to PostgreSQL/MySQL.