Add pypika

book/cooltools/Chapter.ipynb

@@ -1665,6 +1665,45 @@
     "        }\n",
     "    )"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## SQL Query Builder in Python"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "You can build SQL queries in Python with pypika.\n",
+    "\n",
+    "pypika provides a simple interface to build SQL queries with an easy syntax.\n",
+    "\n",
+    "It supports nearly every SQL command."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from pypika import Tables, Query\n",
+    "\n",
+    "history, customers = Tables('history', 'customers')\n",
+    "q = Query \\\n",
+    "    .from_(history) \\\n",
+    "    .join(customers) \\\n",
+    "    .on(history.customer_id == customers.id) \\\n",
+    "    .select(history.star) \\\n",
+    "    .where(customers.id == 5)\n",
+    "    \n",
+    "q.get_sql()\n",
+    "# SELECT \"history\".* FROM \"history\" JOIN \"customers\" \n",
+    "# ON \"history\".\"customer_id\"=\"customers\".\"id\" WHERE \"customers\".\"id\"=5"
+   ]
   }
  ],
  "metadata": {

book/pythontricks/Chapter.ipynb

@@ -961,7 +961,15 @@
   {
    "cell_type": "markdown",
    "metadata": {},
-   "source": []
+   "source": [
+    "One cool feature in Python 3.12:\n",
+    "\n",
+    "The support for Type Variables.\n",
+    "\n",
+    "You can use them to parametrize generic classes and functions.\n",
+    "\n",
+    "See below for a small example where our generic class is parametrized by T which we indicate with [T]."
+   ]
   },
   {
    "cell_type": "code",