from flask import Flask, render_templatefrom flask_sqlalchemy import SQLAlchemyimport configapp = Flask(__name__)app.config.from_object(config)db = SQLAlchemy(app)class User(db.Model):    __tablename__ = 'user'    id = db.Column(db.Integer, primary_key=True, autoincrement=True)    username = db.Column(db.String(20), nullable=False)    password = db.Column(db.String(20), nullable=False)db.create_all()

　　

增加： db.session.add(user) db.session.commit()

user = User(username = 'zhuyinyin',password='113428164508')db.session.add(user)db.session.commit()

查询： User.query.filter(User.username == 'mis1114').first()

User.query.filter(User.username == 'zhuyinyin').first()print(user.username,user.password)

　　

修改： user.password = '111111' db.session.commit()

user=User.query.filter(User.username =='zhuyinyin').first() user.password='123'print(user.username,user.password) db.session.commit()

　　

删除： db.session.delete(user) db.session.commit()

user=User.query.filter(User.username =='zhuyinyin').first()db.session.delete(user)db.session.commit()