错误ID为空，但应自动递增

CREATE TABLE example (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(255)
);

INSERT INTO example (name) VALUES ('John Doe');

INSERT INTO example (id, name) VALUES (NULL, 'John Doe');  -- 错误示例

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

Base = declarative_base()

class Example(Base):
    __tablename__ = 'example'
    id = Column(Integer, primary_key=True, autoincrement=True)
    name = Column(String)

engine = create_engine('sqlite:///example.db')
Base.metadata.create_all(engine)
Session = sessionmaker(bind=engine)
session = Session()

new_example = Example(name='John Doe')
session.add(new_example)
session.commit()