diff --git a/lectures/lecture5/notes/codes/databaser.ipynb b/lectures/lecture5/notes/codes/databaser.ipynb
index 32fdbcb91ddc61d806261184133d4dfd4cd7c008..77be7cffcdf1b66f54ab45391adfe09353b63981 100644
--- a/lectures/lecture5/notes/codes/databaser.ipynb
+++ b/lectures/lecture5/notes/codes/databaser.ipynb
@@ -65,34 +65,11 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 28,
-   "metadata": {},
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "20\n"
-     ]
-    }
-   ],
-   "source": [
-    "foo = None\n",
-    "bar = 2\n",
-    "\n",
-    "# check whether foo is none or not\n",
-    "if foo is None:\n",
-    "    foo = 20\n",
-    "    print (foo)"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 37,
+   "execution_count": 4,
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Keep db connection\n",
+    "# Database connection object\n",
     "global db_connection\n",
     "db_connection = None\n",
     "\n",
@@ -117,7 +94,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 38,
+   "execution_count": 15,
    "metadata": {},
    "outputs": [
     {
@@ -153,7 +130,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 18,
+   "execution_count": 6,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -225,8 +202,12 @@
     "            cursor.execute(\"INSERT INTO objects (giver,in_date,category_id,comment,received_by,name,placement,reg_by,reg_date,reg_no) VALUES(%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)\",\n",
     "                        (giver_val,innlemmet_dato_val,kategori_id,kommentar_val,mottatt_av_val,navn_val,plassering_val,registrert_av_val,registrerings_dato_val,reg_no))\n",
     "\n",
+    "#Oppdater eksisterende rad\n",
+    "save_object_db('Olsen Giver','12.04.2023', 1, 'Tester', 'Kristin', 'Stol', 'PL.A1.B2','Hanne','12.04.2023','TBM.0832')\n",
     "\n",
-    "save_object_db('Olsen Giver','12.04.2023', 1, 'Tester', 'Kristin', 'Stol', 'PL.A1.B2','Hanne','12.04.2023','TBM.0832')"
+    "\n",
+    "#legg til ny rad\n",
+    "save_object_db('Olsen Giver','12.04.2023', 1, 'Tester', 'Kristin', 'Stol', 'PL.A1.B2','Hanne','12.04.2023','TBM.0832-N')\n"
    ]
   },
   {
@@ -236,6 +217,51 @@
    "source": [
     "### Koble opp mot databasen og fjern rader fra en tabell"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#Slett gjenstand\n",
+    "def delete_object(reg_no):\n",
+    "    \"\"\"\n",
+    "    :param regnr: Registreriongsnr på gjenstand som skal slettes\n",
+    "    :return: ingen returverdi.\n",
+    "\n",
+    "    Funksjonen skal finne gjenstanden og slette denne.\n",
+    "    1. Slett fra properties-tabellen for det gitte registreringsnummeret\n",
+    "    2. Slett fra provenances-tabellen for det gitte registreringsnummeret\n",
+    "    3. Slett fra objects-tabellen for det gitte registreringsnummeret\n",
+    "\n",
+    "    Dersom sletting går bra, skriv en melding til skjermen.\n",
+    "    \"\"\"\n",
+    "\n",
+    "    #******************************************\n",
+    "    # Oppgave 4.3\n",
+    "    # Fullfør denne funksjonen\n",
+    "    #******************************************\n",
+    "\n",
+    "\n",
+    "    with get_db_connection() as db:\n",
+    "        db.autocommit(True)\n",
+    "\n",
+    "        cursor = db.cursor()\n",
+    "        cursor.execute(\"DELETE from properties where reg_no='\" + reg_no+\"'\")\n",
+    "        cursor.execute(\"DELETE from provenances where reg_no='\" + reg_no+\"'\")\n",
+    "        cursor.execute(\"DELETE from objects where reg_no='\" + reg_no+\"'\")\n",
+    "\n",
+    "\n",
+    "delete_object('TBM.0832-N')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
@@ -254,7 +280,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.6"
+   "version": "3.11.2"
   },
   "orig_nbformat": 4
  },
diff --git a/lectures/lectures.json b/lectures/lectures.json
index cc89e122539dc08a22e47bafe97b08a7fcb83557..daf50c9b025178923dca80eb99a36207bd881e81 100644
--- a/lectures/lectures.json
+++ b/lectures/lectures.json
@@ -67,7 +67,7 @@
                     ]
                 }
                 ,{"Unntakshåndtering":""}
-                ,{"Programmering mot databaser":""}
+                ,{"Programmering mot databaser":{"Lesing og skriving til database": "lecture5/notes/codes/databaser.ipynb"}}
                 ,{"Lab 5": {"Lab-5":"lecture5/lab/lab-5.md"}}
             ]
         },
diff --git a/lectures/lectures.md b/lectures/lectures.md
index 78fb5d089fe19367fcd54b6409917e1d42e91ecd..6175fdd88068a737c24ccb1b3e47ce875ea68905 100644
--- a/lectures/lectures.md
+++ b/lectures/lectures.md
@@ -106,7 +106,7 @@
 <blockquote style="font-size:200%;cursor: pointer;padding: 10px;">&emsp;&emsp;&emsp;</blockquote>
 </details>
 <details><summary style="font-size:200%;cursor: pointer;">&emsp;&emsp;Programmering mot databaser</summary>
-<blockquote style="font-size:200%;cursor: pointer;padding: 10px;">&emsp;&emsp;&emsp;</blockquote>
+<blockquote style="font-size:200%;cursor: pointer;padding: 10px;">&emsp;&emsp;&emsp;<a target="_blank" href=lecture5/notes/codes/databaser.ipynb>Lesing og skriving til database</a></blockquote>
 </details>
 <details><summary style="font-size:200%;cursor: pointer;">&emsp;&emsp;Lab 5</summary>
 <blockquote style="font-size:200%;cursor: pointer;padding: 10px;">&emsp;&emsp;&emsp;<a target="_blank" href=lecture5/lab/lab-5.md>Lab-5</a></blockquote>