code: def on_startup():
      create_db_and_tables()
  
file_path: sqlmodel/docs_src/tutorial/fastapi/multiple_models/tutorial002_py39.py
imports: from typing import Optional
  from fastapi import FastAPI
  from sqlmodel import Field, Session, SQLModel, create_engine, select
label_desc: Use image node_id 2 for calling a global function with example usage: on_startup() without return types