diff --git a/aharlamcev/postgresql/WindowFunctionHomework.sql b/aharlamcev/postgresql/WindowFunctionHomework.sql
index 72dd993..bd81ac9 100644
--- a/aharlamcev/postgresql/WindowFunctionHomework.sql
+++ b/aharlamcev/postgresql/WindowFunctionHomework.sql
@@ -19,12 +19,15 @@ values (1, 'iPhone 14', 'smartphone', 799, true, 'iphone@apple.com'),
 (9, 'Honor Pad X9',	'tablet',	219,	true,	'honor@support.com'),
 (10, 'Dell XPS 13',	'laptop',	1099,	false,	'dell@support.com');
 
+alter table products_extended
+alter column price type DECIMAL(10, 2)
+
 select * from products_extended
 
 with email_false as (select * from 
 (
 select category, name, price, email_support, row_number() over (partition by category order by price desc) as rn
-from products_extended where email_support is null)
+from products_extended where email_support is null) where rn = 1
 ),
 
 email_true as (select * from