diff --git a/memory_db.py b/memory_db.py
index 575c77d99841878a00d18caf5e7e7c747157085e..ea719819066b21aaeed63b13f8f0975b6b77ae2d 100644
--- a/memory_db.py
+++ b/memory_db.py
@@ -166,7 +166,11 @@ class InMemoryDatabase():
         """
         query = """
             SELECT 
-                * 
+                patients.mrn,
+                patients.age,
+                patients.sex,
+                test_results.date,
+                test_results.result
             FROM
                 patients
             JOIN
diff --git a/test.ipynb b/test.ipynb
new file mode 100644
index 0000000000000000000000000000000000000000..2ecc36a01c94c384bf4bee37ccd7abd0022f8302
--- /dev/null
+++ b/test.ipynb
@@ -0,0 +1,81 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 25,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from memory_db import InMemoryDatabase\n",
+    "from utils import populate_test_results_table\n",
+    "import csv\n",
+    "import constants\n",
+    "import datetime"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 26,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "db = InMemoryDatabase()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 27,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "populate_test_results_table(db, 'history.csv')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 28,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "db.persist_db()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 29,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "db.close()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "venv",
+   "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": "3.10.12"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}