Rename section database to databases.

book/35-example-designs/010-sales-database.ipynb

@@ -4,26 +4,36 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# Sales Database"
+    "# 02 Sales Database\n",
+    "\n",
+    "This is the classic sales database provided as part of the MySQL tutorial. Distributed here without change under fair use for the purposes of instruction.\n",
+    "\n",
+    "http://www.mysqltutorial.org/mysql-sample-database.aspx"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
     "import pymysql\n",
+    "import os\n",
     "pymysql.install_as_MySQLdb()\n",
     "\n",
+    "connection_string = \"mysql://{user}:{password}@{host}\".format(\n",
+    "    user=os.environ['DJ_USER'],\n",
+    "    host=os.environ['DJ_HOST'],\n",
+    "    password=os.environ['DJ_PASS']\n",
+    ")\n",
+    "\n",
     "%load_ext sql\n",
-    "%config SqlMagic.autocommit=True\n",
-    "%sql  mysql://root:[email protected]"
+    "%sql $connection_string"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {