* Chapter 1: Schema and Types
#+BEGIN_SRC python :results output
  import sqlalchemy
  print(sqlalchemy.__version__)
#+END_SRC

#+RESULTS:
: 2.0.52


#+BEGIN_SRC python :session ch1
  from sqlalchemy import MetaData

  metadata = MetaData()
#+END_SRC


#+BEGIN_SRC python :session ch1
  from sqlalchemy import Table, Column, Integer, Numeric, String, ForeignKey

  cookies = Table(
      "cookies",
      metadata,
      Column("cookie_id", Integer(), primary_key=True),
      Column("cookie_name", String(50), index=True),
      Column("cookie_recipie_url", String(255)),
      Column("cookie_sku", String(55)),
      Column("quantity", Integer()),
      Column("unit_cost", Numeric(12, 2)),
  )
#+END_SRC

#+BEGIN_SRC python :session ch1
  from datetime import datetime
  from sqlalchemy import DateTime

  users = Table(
      "users",
      metadata,
      Column("user_id", Integer(), primary_key=True),
      Column("username", String(15), nullable=False, unique=True),
      Column("email_address", String(255), nullable=False),
      Column("phone", String(20), nullable=False),
      Column("password", String(25), nullable=False),
      Column("created_on", DateTime(), default=datetime.now),
      Column("updated_on", DateTime(), default=datetime.now, onupdate=datetime.now),
  )
#+END_SRC