db.execute("CREATE TABLE if not exists offline_feeds (id integer, title text)");
db.execute("CREATE TABLE if not exists offline_data (id integer, feed_id integer, title text, link text, guid text, updated text, content text, tags text)");
db.execute("CREATE TABLE if not exists offline_data (id integer, feed_id integer, title text, link text, guid text, updated text, content text, tags text, unread text, marked text)");