{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "4d2f6331-3b21-45d8-a1d4-0f31471463ce",
   "metadata": {},
   "outputs": [],
   "source": [
    "import csv\n",
    "from DATA225utils import make_connection, dataframe_query"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "295c34b0-4708-4eca-9e24-b281eedfb98d",
   "metadata": {},
   "outputs": [],
   "source": [
    "conn = make_connection('titanic.ini')\n",
    "cursor = conn.cursor()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "50909cf3-bcd7-4b02-a5b7-c67c24f9f0c9",
   "metadata": {},
   "source": [
    "## Create the passenger table."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "e6e622d8-8f3f-43b4-9999-74e2d73521b9",
   "metadata": {},
   "outputs": [],
   "source": [
    "cursor.execute('DROP TABLE IF EXISTS passengers')\n",
    "\n",
    "cursor.execute( \"\"\"\n",
    "    CREATE TABLE passengers\n",
    "    (\n",
    "        name            VARCHAR(32)  NOT NULL,\n",
    "        survived        VARCHAR(3) NOT NULL,\n",
    "        sex             VARCHAR(6) NOT NULL,\n",
    "        age             VARCHAR(16) NOT NULL,\n",
    "        passenger_class VARCHAR(3),\n",
    "        PRIMARY KEY (name, age, passenger_class)\n",
    "    )\n",
    "    \"\"\"\n",
    "              )"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "c81f8d1a-1732-4d99-96bf-7adeb94294f2",
   "metadata": {},
   "source": [
    "## Load the passenger table."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "3c3cc688-1e76-4b69-8a38-30d9c8427e69",
   "metadata": {},
   "outputs": [],
   "source": [
    "sql = (   \"\"\"\n",
    "          INSERT INTO passengers\n",
    "          VALUES (%s, %s, %s, %s, %s)\n",
    "          \"\"\"\n",
    "        )\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "ebcb7af9-1870-49dc-8de5-e65d4c79110f",
   "metadata": {},
   "outputs": [],
   "source": [
    "first = True\n",
    "\n",
    "with open('TitanicSurvival.csv', newline='') as csv_file:\n",
    "    data = csv.reader(csv_file, delimiter=',', quotechar='\"')\n",
    "    \n",
    "    for row in data:\n",
    "        if not first:\n",
    "            cursor.execute(sql, row)\n",
    "            \n",
    "        first = False\n",
    "    \n",
    "conn.commit()"
   ]
  },
  {
   "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 and display 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 >= 21\n",
    "    AND   age < 25\n",
    "    \"\"\"\n",
    "\n",
    "cursor.execute(sql)\n",
    "conn.commit()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "77e3380d-2ee6-4769-a794-48a4a07bda31",
   "metadata": {},
   "outputs": [],
   "source": [
    "_, df = dataframe_query(conn, \"\"\"\n",
    "    SELECT *\n",
    "    FROM young_men_survivors\n",
    "    ORDER BY class\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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