游戏数据库存储双十一促销活动

CREATE TABLE promotions (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    description TEXT,
    start_date DATETIME NOT NULL,
    end_date DATETIME NOT NULL,
    discount_percentage DECIMAL(5, 2),
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
);

from sqlalchemy import create_engine, Column, Integer, String, Text, DateTime, DECIMAL
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from datetime import datetime

Base = declarative_base()

class Promotion(Base):
    __tablename__ = 'promotions'
    id = Column(Integer, primary_key=True)
    name = Column(String(255), nullable=False)
    description = Column(Text)
    start_date = Column(DateTime, nullable=False)
    end_date = Column(DateTime, nullable=False)
    discount_percentage = Column(DECIMAL(5, 2))
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

engine = create_engine('mysql+pymysql://user:password@host/dbname')
Base.metadata.create_all(engine)
Session = sessionmaker(bind=engine)
session = Session()

# 添加一个新的促销活动
new_promotion = Promotion(
    name="双十一大促",
    description="全场商品8折优惠",
    start_date=datetime(2023, 11, 1, 0, 0),
    end_date=datetime(2023, 11, 11, 23, 59)
)
session.add(new_promotion)
session.commit()

# 查询所有促销活动
promotions = session.query(Promotion).all()
for promo in promotions:
    print(f"活动名称: {promo.name}, 描述: {promo.description}, 时间: {promo.start_date} 至 {promo.end_date}")