JSON - Postgres:使用with_entities查询SQLAlchemy元素

from sqlalchemy import create_engine, Column, Integer, String
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base

# 创建数据库连接
engine = create_engine('postgresql://username:password@localhost/dbname')
Session = sessionmaker(bind=engine)
session = Session()

# 创建映射类
Base = declarative_base()

class User(Base):
    __tablename__ = 'users'
    id = Column(Integer, primary_key=True)
    name = Column(String)
    age = Column(Integer)

# 查询name和age字段
result = session.query(User).with_entities(User.name, User.age).all()

# 打印查询结果
for name, age in result:
    print(f"Name: {name}, Age: {age}")