diff --git a/steam_chat_logger.py b/steam_chat_logger.py
index ea4bed3..27f13f1 100755
--- a/steam_chat_logger.py
+++ b/steam_chat_logger.py
@@ -92,8 +92,23 @@ import re
 from urllib.parse import urlparse
 import requests
 from hashlib import sha3_256
+import pb8000
 
 pdt = pytz.timezone("Us/Pacific")
+db = pg8000.connect(
+    host=credentials[app]['host'],
+    port=credentials[app]['port'],
+    database=credentials[app]['database'],
+    user=credentials[app]['user'],
+    password=credentials[app]['password'],
+)
+
+def query(app, query, **params):
+    cursor = db(app).cursor()
+    cursor.paramstyle = "named"
+    cursor.execute(query, params)
+    db(app).commit()
+    return cursor
 
 def parse_trs(trs):
     for tr in trs:
@@ -103,19 +118,42 @@ def parse_trs(trs):
         to_url = tds[1].find('a')['href']
         to_name = tds[1].text
         date = datetime.strptime(tds[2].text, '%b %d, %Y @ %I:%M%p PDT').replace(tzinfo=pdt)
-        text = tds[3].text
+        message = tds[3].text
         checksum = sha3_256(
-            (from_url + to_url + str(date.timestamp()) + text).encode()
+            (from_url + to_url + str(date.timestamp()) + message).encode()
         ).hexdigest()
-        print(f'(#{checksum}@{date}) {from_name} -> {to_name}: {text}')
+        print(f'(#{checksum}@{date}) {from_name} -> {to_name}: {message}')
 
-        # download steamuserimages
-        for url_string in re.findall(r'(https?://\S+)', text):
-            url = urlparse(url_string)
-            if url.netloc.startswith('steamuserimages'):
-                response = requests.get(url_string)
-                with open(url.path.strip('/').replace('/', '_'), "wb") as f:
-                    f.write(response.content)
+        if query(
+            '''
+                SELECT 1 FROM messages
+                WHERE checksum = :checksum
+            ''',
+            checksum=checksum,
+        ).rowcount:
+            print(f'message {checksum} already exists')
+        else:
+            print(f'adding new message {checksum}')
+            query(
+                '''
+                    INSERT INTO messages (checksum, from_url, from_name, to_url, to_name, date, message)
+                    VALUES(:checksum, :from_url, :from_name, :to_url, :to_name, :date, :message)
+                ''',
+                checksum=checksum,
+                from_url=from_url,
+                from_name=from_name,
+                to_url=to_url,
+                to_name=to_name,
+                date=date,
+                message=message,
+            )
+            # download steamuserimages
+            for url_string in re.findall(r'(https?://\S+)', text):
+                url = urlparse(url_string)
+                if url.netloc.startswith('steamuserimages'):
+                    response = requests.get(url_string)
+                    with open(url.path.strip('/').replace('/', '_'), "wb") as f:
+                        f.write(response.content)
 
 # get first page