Поправил форму и добавил описание

aysat/lifecoding/SQL1.sql

@@ -16,22 +16,30 @@
 '''
 
 with monthly_users as (
-select count(distinct(user_id)) as active_users,
+     select 
+          count(distinct(user_id)) as active_users,
           date_trunc('month', date) as month
-from abakhytbekuly.users
+     from 
-group by date_trunc('month', date)
+         abakhytbekuly.users
+     group by 
+         date_trunc('month', date)
 ),
   change as (
       select active_users,
              month,
              lag(active_users) over(order by month) as prev_mau
-from monthly_users
+      from 
+          monthly_users
 )
-select active_users, 
+select 
+    active_users, 
     month,
     prev_mau,
     100.0 * (active_users - prev_mau) / prev_mau as pct_change -- тут результат странный типа '-66.666666'
-from change
+from 
-where prev_mau is not null   
+     change
-order by month
+where 
+     prev_mau is not null   
+order by 
+     month