diff --git a/nbs/index.ipynb b/nbs/index.ipynb
index 971e09a..1c362a9 100644
--- a/nbs/index.ipynb
+++ b/nbs/index.ipynb
@@ -43,7 +43,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 1,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -61,7 +61,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 2,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -81,7 +81,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 3,
    "metadata": {},
    "outputs": [
     {
@@ -90,7 +90,7 @@
        "Album, Artist, Customer, Employee, Genre, Invoice, InvoiceLine, MediaType, Playlist, PlaylistTrack, Track"
       ]
      },
-     "execution_count": null,
+     "execution_count": 3,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -109,7 +109,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 4,
    "metadata": {},
    "outputs": [
     {
@@ -118,7 +118,7 @@
        "<Table artists (does not exist yet)>"
       ]
      },
-     "execution_count": null,
+     "execution_count": 4,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -130,7 +130,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 5,
    "metadata": {},
    "outputs": [
     {
@@ -139,7 +139,7 @@
        "<Table Artist (ArtistId, Name)>"
       ]
      },
-     "execution_count": null,
+     "execution_count": 5,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -158,7 +158,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 6,
    "metadata": {},
    "outputs": [
     {
@@ -171,7 +171,7 @@
        " <Table MediaType (MediaTypeId, Name)>]"
       ]
      },
-     "execution_count": null,
+     "execution_count": 6,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -203,7 +203,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 7,
    "metadata": {},
    "outputs": [
     {
@@ -212,7 +212,7 @@
        "True"
       ]
      },
-     "execution_count": null,
+     "execution_count": 7,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -230,7 +230,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 8,
    "metadata": {},
    "outputs": [
     {
@@ -239,7 +239,7 @@
        "ArtistId, Name"
       ]
      },
-     "execution_count": null,
+     "execution_count": 8,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -272,7 +272,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 9,
    "metadata": {},
    "outputs": [
     {
@@ -297,7 +297,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 10,
    "metadata": {},
    "outputs": [
     {
@@ -306,7 +306,7 @@
        "[{'ArtistId': 1, 'Name': 'AC/DC'}]"
       ]
      },
-     "execution_count": null,
+     "execution_count": 10,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -324,7 +324,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 11,
    "metadata": {},
    "outputs": [
     {
@@ -336,7 +336,7 @@
        " {'AlbumId': 4, 'Title': 'Let There Be Rock', 'ArtistId': 1}]"
       ]
      },
-     "execution_count": null,
+     "execution_count": 11,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -369,7 +369,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 12,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -385,7 +385,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 13,
    "metadata": {},
    "outputs": [
     {
@@ -394,7 +394,7 @@
        "Album(AlbumId=1, Title='For Those About To Rock We Salute You', ArtistId=1)"
       ]
      },
-     "execution_count": null,
+     "execution_count": 13,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -413,7 +413,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 14,
    "metadata": {},
    "outputs": [
     {
@@ -432,7 +432,7 @@
        "<IPython.core.display.Markdown object>"
       ]
      },
-     "execution_count": null,
+     "execution_count": 14,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -451,7 +451,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 15,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -460,7 +460,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 16,
    "metadata": {},
    "outputs": [
     {
@@ -469,7 +469,7 @@
        "Track(TrackId=None, Name=None, AlbumId=None, MediaTypeId=None, GenreId=None, Composer=None, Milliseconds=None, Bytes=None, UnitPrice=None)"
       ]
      },
-     "execution_count": null,
+     "execution_count": 16,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -489,7 +489,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 17,
    "metadata": {},
    "outputs": [
     {
@@ -498,7 +498,7 @@
        "Track(TrackId=1, Name='For Those About To Rock (We Salute You)', AlbumId=1, MediaTypeId=1, GenreId=1, Composer='Angus Young, Malcolm Young, Brian Johnson', Milliseconds=343719, Bytes=11170334, UnitPrice=0.99)"
       ]
      },
-     "execution_count": null,
+     "execution_count": 17,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -516,7 +516,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 18,
    "metadata": {},
    "outputs": [
     {
@@ -526,7 +526,7 @@
        " Album(AlbumId=2, Title='Balls to the Wall', ArtistId=2)]"
       ]
      },
-     "execution_count": null,
+     "execution_count": 18,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -544,7 +544,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 19,
    "metadata": {},
    "outputs": [
     {
@@ -555,7 +555,7 @@
        " (2, Album(AlbumId=2, Title='Balls to the Wall', ArtistId=2))]"
       ]
      },
-     "execution_count": null,
+     "execution_count": 19,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -573,7 +573,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 20,
    "metadata": {},
    "outputs": [
     {
@@ -582,7 +582,7 @@
        "Album(AlbumId=5, Title='Big Ones', ArtistId=3)"
       ]
      },
-     "execution_count": null,
+     "execution_count": 20,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -600,7 +600,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 21,
    "metadata": {},
    "outputs": [
     {
@@ -627,7 +627,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 22,
    "metadata": {},
    "outputs": [
     {
@@ -637,7 +637,7 @@
        " Album(AlbumId=4, Title='Let There Be Rock', ArtistId=1)]"
       ]
      },
-     "execution_count": null,
+     "execution_count": 22,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -677,7 +677,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 23,
    "metadata": {},
    "outputs": [
     {
@@ -686,7 +686,7 @@
        "<Table cats (does not exist yet)>"
       ]
      },
-     "execution_count": null,
+     "execution_count": 23,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -705,7 +705,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 24,
    "metadata": {},
    "outputs": [
     {
@@ -724,7 +724,7 @@
        "<IPython.core.display.Markdown object>"
       ]
      },
-     "execution_count": null,
+     "execution_count": 24,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -743,7 +743,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 25,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -760,7 +760,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 26,
    "metadata": {},
    "outputs": [
     {
@@ -769,7 +769,7 @@
        "{'id': 1, 'name': 'meow', 'weight': 6.0, 'uid': 2}"
       ]
      },
-     "execution_count": null,
+     "execution_count": 26,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -787,7 +787,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 27,
    "metadata": {},
    "outputs": [
     {
@@ -796,7 +796,7 @@
        "[{'id': 1, 'name': 'moo', 'weight': 6.0, 'uid': 2}]"
       ]
      },
-     "execution_count": null,
+     "execution_count": 27,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -819,7 +819,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 28,
    "metadata": {},
    "outputs": [
     {
@@ -845,7 +845,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 29,
    "metadata": {},
    "outputs": [
     {
@@ -854,7 +854,7 @@
        "Cats(id=1, name='moo', weight=6.0, uid=2)"
       ]
      },
-     "execution_count": null,
+     "execution_count": 29,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -868,7 +868,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 30,
    "metadata": {},
    "outputs": [
     {
@@ -877,7 +877,7 @@
        "<Table cats (does not exist yet)>"
       ]
      },
-     "execution_count": null,
+     "execution_count": 30,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -896,7 +896,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 31,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -905,7 +905,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 32,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -914,7 +914,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 33,
    "metadata": {},
    "outputs": [
     {
@@ -933,7 +933,7 @@
        "<IPython.core.display.Markdown object>"
       ]
      },
-     "execution_count": null,
+     "execution_count": 33,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -944,29 +944,29 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 34,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "[Cats(id=1, name='foo', weight=6.0, uid=2)]"
+       "[Cats(id=1, name='咪咪', weight=9.0, uid=2)]"
       ]
      },
-     "execution_count": null,
+     "execution_count": 34,
      "metadata": {},
      "output_type": "execute_result"
     }
    ],
    "source": [
-    "cat.name = 'foo'\n",
+    "cat = Cats(name='咪咪', weight=9, uid=2)\n",
     "cats.insert(cat)\n",
     "cats()"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 35,
    "metadata": {},
    "outputs": [
     {
@@ -975,7 +975,7 @@
        "<Table cats (does not exist yet)>"
       ]
      },
-     "execution_count": null,
+     "execution_count": 35,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -987,14 +987,18 @@
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
+   "metadata": {
+    "heading_collapsed": true
+   },
    "source": [
     "## Diagrams"
    ]
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
+   "metadata": {
+    "hidden": true
+   },
    "source": [
     "If you have graphviz installed, you can create database diagrams:"
    ]
@@ -1002,7 +1006,9 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "metadata": {},
+   "metadata": {
+    "hidden": true
+   },
    "outputs": [
     {
      "data": {
@@ -1330,7 +1336,9 @@
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
+   "metadata": {
+    "hidden": true
+   },
    "source": [
     "Pass a subset of tables to just diagram those. You can also adjust the size and aspect ratio."
    ]
@@ -1338,7 +1346,9 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "metadata": {},
+   "metadata": {
+    "hidden": true
+   },
    "outputs": [
     {
      "data": {
@@ -1492,9 +1502,21 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "python3",
+   "display_name": "Python 3 (ipykernel)",
    "language": "python",
    "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.11.8"
   }
  },
  "nbformat": 4,