注：使用前請安裝flask_sqlalchemy包，由於python-mysql不適用於python3.6，所以我們使用pymysql進行替代

1.flask的app檔案中輸入以下程式碼

(檔名為：learn_flask_mysql_orm.py)
from flask import Flask
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
app.config["SQLALCHEMY_DATABASE_URI"]="mysql+pymysql://root:@127.0.0.1:3306/learn_flask_mysql"
 

#注：請勿忘記新增'+pymysql'，否則將會出現沒有安裝mysqldb的報錯

db = SQLAlchemy(app)


@app.route('/')
def hello_world():
    return 'Hello World!'


if __name__ == '__main__':
    app.run()

2.在flask資料夾中新建一個models.py檔案，並輸入以下程式碼

from learn_flask_mysql_orm import db

class User(db.Model):
    __tablename__ = 'user'
    user_id = db.Column(db.INT,primary_key=True
 
)
    user_name = db.Column(db.TEXT)

    def __init__(self,user_id,user_name):
        self.user_id = user_id
        self.user_name = user_name

    def __str__(self):
        return "id:{}    name:{}".format(self.user_id,self.user_name)

3.在flask中新建一個manage.py檔案，輸入以下程式碼

from flask_script import
 
 Manager
from models import User
from learn_flask_mysql_orm import app,db

manager = Manager(app)

@manager.command
def save():
    user = User(11,'zhangjia11')
    db.session.add(user)
    db.session.commit()

@manager.command
def query_all():
    users = User.query.all()
    for user in users:
        print(user)

if __name__ == "__main__":
    manager.run()

之後使用python manage.py save即可儲存資料，使用python manage.py qurey_all即可查詢資料