Index: src/config/database.js
===================================================================
--- src/config/database.js	(revision 37edecd7c1a492799587f07cc44fb88fbd1567ee)
+++ src/config/database.js	(revision 6be57b4716118bcb1264cfea3f073b10963be2bf)
@@ -146,4 +146,10 @@
     );
     CREATE INDEX IF NOT EXISTS idx_stat_visitor_day ON stat_visitor_day(site_id, day);
+    CREATE TABLE IF NOT EXISTS stat_referrer (
+      site_id TEXT NOT NULL,
+      host TEXT NOT NULL,
+      count INTEGER NOT NULL DEFAULT 0,
+      PRIMARY KEY (site_id, host)
+    );
   `);