{
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  {
   "cell_type": "code",
   "execution_count": null,
   "id": "4d2f6331-3b21-45d8-a1d4-0f31471463ce",
   "metadata": {},
   "outputs": [],
   "source": [
    "from data201 import make_connection, dataframe_query"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "295c34b0-4708-4eca-9e24-b281eedfb98d",
   "metadata": {},
   "outputs": [],
   "source": [
    "conn = make_connection('titanic_2.ini')"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "829ae112-aacf-4ea2-8df4-bea2de1474df",
   "metadata": {},
   "source": [
    "# Create the young_men_survivors table."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "05d30dd3-5bfe-47ce-8086-92334d8fdf4e",
   "metadata": {},
   "outputs": [],
   "source": [
    "cursor.execute('DROP TABLE IF EXISTS young_men_survivors')\n",
    "\n",
    "sql = \"\"\"\n",
    "    CREATE TABLE young_men_survivors\n",
    "    (\n",
    "        name     VARCHAR(32) NOT NULL UNIQUE,\n",
    "        age      DOUBLE      NOT NULL,\n",
    "        class    INT         NOT NULL,\n",
    "        PRIMARY KEY(name)\n",
    "    )\n",
    "    \"\"\"\n",
    "\n",
    "cursor.execute(sql)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "08eebdcd-1c6c-460e-a77d-243350c86fcf",
   "metadata": {},
   "source": [
    "# Load the young_men_survivors table."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "53e3671d-b155-485d-a90c-e977cd7e2be4",
   "metadata": {},
   "outputs": [],
   "source": [
    "sql = \"\"\"\n",
    "    INSERT INTO young_men_survivors\n",
    "    SELECT name, age,\n",
    "        CASE \n",
    "            WHEN passenger_class = '1st' THEN 1\n",
    "            WHEN passenger_class = '2nd' THEN 2\n",
    "            WHEN passenger_class = '3rd' THEN 3\n",
    "            ELSE 0\n",
    "        END AS class\n",
    "    FROM passengers\n",
    "    WHERE sex = 'male'\n",
    "    AND   survived = 'yes'\n",
    "    AND   age BETWEEN 21 AND 24\n",
    "    \"\"\"\n",
    "\n",
    "cursor.execute(sql)\n",
    "conn.commit()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "7a071f1a-99b5-43f8-b625-19aa95bb6fbe",
   "metadata": {},
   "source": [
    "# Display the table."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "77e3380d-2ee6-4769-a794-48a4a07bda31",
   "metadata": {},
   "outputs": [],
   "source": [
    "_, df = dataframe_query(conn, \n",
    "    \"\"\"\n",
    "    SELECT *\n",
    "    FROM young_men_survivors\n",
    "    ORDER BY class, age\n",
    "    \"\"\"\n",
    "                       )\n",
    "display(df)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "3d50dd07-7174-47a2-aba2-999ae303c8ef",
   "metadata": {},
   "outputs": [],
   "source": [
    "conn.close()"
   ]
  }
 ],
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