diff --git a/dbmigrate.py b/dbmigrate.py
new file mode 100644
index 0000000..396f576
--- /dev/null
+++ b/dbmigrate.py
@@ -0,0 +1,37 @@
+#!/usr/bin/python
+# -*- coding: UTF-8 -*-
+
+import sqlite3
+
+connection = sqlite3.connect("db.sqlite")
+cursor = connection.cursor()
+
+# What script performs: 
+# - first, remove site table: crash here if table doesn't exist (compatibility test without effort)
+# - remove site_id colum from comment table
+script = """
+PRAGMA foreign_keys = OFF;
+BEGIN TRANSACTION;
+DROP TABLE site;
+ALTER TABLE comment RENAME TO _comment_old;
+CREATE TABLE comment (
+    id INTEGER NOT NULL PRIMARY KEY, 
+	url VARCHAR(255) NOT NULL, 
+	notified DATETIME,
+	created DATETIME NOT NULL, 
+	published DATETIME, 
+	author_name VARCHAR(255) NOT NULL, 
+	author_site VARCHAR(255) NOT NULL,
+	author_gravatar varchar(255),
+	content TEXT NOT NULL 
+);
+INSERT INTO comment (id, url, notified, created, published, author_name, author_site, author_gravatar, content)
+  SELECT id, url, notified, created, published, author_name, author_site, author_gravatar, content
+  FROM _comment_old;
+DROP TABLE _comment_old;
+COMMIT;
+PRAGMA foreign_keys = ON;
+"""
+
+cursor.executescript(script)
+connection.close()
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