01-exercises.ipynb

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   "source": [
    "# SQL 入門\n",
    "\n",
    "> 快速啟動：隨堂練習\n",
    "\n",
    "郭耀仁"
   ]
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   "source": [
    "import sqlite3\n",
    "import pandas as pd\n",
    "from sqlFrameCheck import checkAnsQuery\n",
    "from test_queries.test_queries_01 import extract_test_queries as etq\n",
    "\n",
    "conn_twelection = sqlite3.connect('twelection.db')"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "## 隨堂練習：由 `sqlite_master` 表格中選擇 `type` 與 `name` 這兩個欄位暸解 `twelection.db` 中有哪些表格"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "ans_query = \"\"\"\n",
    "-- 將查詢語法寫在這裡\n",
    "\"\"\"\n",
    "# 試跑看看結果\n",
    "pd.read_sql(ans_query, conn_twelection)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "subslide"
    }
   },
   "source": [
    "## 測資比對"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "caq = checkAnsQuery(etq('0101'), ans_query, conn_twelection)\n",
    "caq.run_test()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "## 隨堂練習：使用 `PRAGMA` 指令與 `TABLE_INFO()` 函式暸解 `presidential2020` 中有哪些欄位"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "ans_query = \"\"\"\n",
    "-- 將查詢語法寫在這裡\n",
    "\"\"\"\n",
    "# 試跑看看結果\n",
    "pd.read_sql(ans_query, conn_twelection)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "subslide"
    }
   },
   "source": [
    "## 測資比對"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "caq = checkAnsQuery(etq('0102'), ans_query, conn_twelection)\n",
    "caq.run_test()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "## 隨堂練習：使用 `SELECT *` 將 `presidential2020` 中有哪些資料都查詢出來"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "ans_query = \"\"\"\n",
    "-- 將查詢語法寫在這裡\n",
    "\"\"\"\n",
    "# 試跑看看結果\n",
    "pd.read_sql(ans_query, conn_twelection)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "subslide"
    }
   },
   "source": [
    "## 測資比對"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "caq = checkAnsQuery(etq('0103'), ans_query, conn_twelection)\n",
    "caq.run_test()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "## 隨堂練習：使用 `SELECT ` 將 `presidential2020` 表格中的 `county`、`town` 與 `village` 三個欄位選擇出來"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "ans_query = \"\"\"\n",
    "-- 將查詢語法寫在這裡\n",
    "\"\"\"\n",
    "# 試跑看看結果\n",
    "pd.read_sql(ans_query, conn_twelection)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "subslide"
    }
   },
   "source": [
    "## 測資比對"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "caq = checkAnsQuery(etq('0104'), ans_query, conn_twelection)\n",
    "caq.run_test()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "## 隨堂練習：使用 `DISTINCT ` 檢視 `presidential2020` 表格中的 `candidates` 有幾組候選人參選"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "ans_query = \"\"\"\n",
    "-- 將查詢語法寫在這裡\n",
    "\"\"\"\n",
    "# 試跑看看結果\n",
    "pd.read_sql(ans_query, conn_twelection)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "subslide"
    }
   },
   "source": [
    "## 測資比對"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "caq = checkAnsQuery(etq('0105'), ans_query, conn_twelection)\n",
    "caq.run_test()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "## 隨堂練習：使用 `DISTINCT ` 檢視 `presidential2016` 表格中的 `candidates` 有幾組候選人參選"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "ans_query = \"\"\"\n",
    "-- 將查詢語法寫在這裡\n",
    "\"\"\"\n",
    "# 試跑看看結果\n",
    "pd.read_sql(ans_query, conn_twelection)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "subslide"
    }
   },
   "source": [
    "## 測資比對"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "caq = checkAnsQuery(etq('0106'), ans_query, conn_twelection)\n",
    "caq.run_test()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "## 隨堂練習：使用 `LIMIT ` 檢視 `presidential2020` 表格中的前 10 個觀測值"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "ans_query = \"\"\"\n",
    "-- 將查詢語法寫在這裡\n",
    "\"\"\"\n",
    "# 試跑看看結果\n",
    "pd.read_sql(ans_query, conn_twelection)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "subslide"
    }
   },
   "source": [
    "## 測資比對"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "caq = checkAnsQuery(etq('0107'), ans_query, conn_twelection)\n",
    "caq.run_test()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "## 隨堂練習：使用 `DISTINCT` 檢視 `presidential2020` 表格中的 `county` 有幾個縣市，並以 `AS` 將 `county` 命名為 `distinct_counties`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "ans_query = \"\"\"\n",
    "-- 將查詢語法寫在這裡\n",
    "\"\"\"\n",
    "# 試跑看看結果\n",
    "pd.read_sql(ans_query, conn_twelection)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "subslide"
    }
   },
   "source": [
    "## 測資比對"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "caq = checkAnsQuery(etq('0108'), ans_query, conn_twelection)\n",
    "caq.run_test()"
   ]
  }
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