表結構:
![Python 之 sqlalchemy更新數據]()
代碼:
#Author Kang
import sqlalchemy
from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column,Integer,String
from sqlalchemy.orm import sessionmaker
#創建對象的基類:
Base = declarative_base()
#定義User對象:
class User(Base):
#表的名字:
__tablename__ = 'user'
#表的結構:
userid = Column(Integer,primary_key=True)
username = Column(String(20))
age = Column(Integer)
department = Column(String(20))
#初始化數據庫連接
engine = create_engine("mysql+pymysql://kang:[email protected]/test",encoding="utf-8")
#創建session類型
DBSession = sessionmaker(bind=engine)
#創建session對象
session = DBSession()
#更新語句方式爲,先查詢數據出來,然後直接更改就可以
#查出用戶名爲"MK"的,然後賦於新的值
user_info = session.query(User).filter(User.username.like("MK")).first()
user_info.username="MingKang"
session.commit()