diff --git a/dmezentsev/postgresql/homework/Views.sql b/dmezentsev/postgresql/homework/Views.sql
index 8454a63..6dbcc00 100755
--- a/dmezentsev/postgresql/homework/Views.sql
+++ b/dmezentsev/postgresql/homework/Views.sql
@@ -16,6 +16,7 @@ SELECT p.category,
 FROM dmezentsev.products p
 JOIN dmezentsev.orders_items oi ON p.id = oi.product_id
 JOIN dmezentsev.orders o ON oi.order_id = o.id
+GROUP BY p.category
 WHERE o.status = 'paid'
 ORDER BY total_revenue DESC