diff --git a/aysat/lifecoding/SQL1.sql b/aysat/lifecoding/SQL1.sql
new file mode 100644
index 0000000..667bc05
--- /dev/null
+++ b/aysat/lifecoding/SQL1.sql
@@ -0,0 +1,19 @@
+with cte1 as (
+select count(distinct(user_id)) as mau,
+date_trunc('month', date) as month
+from abakhytbekuly.users
+group by date_trunc('month', date)
+),
+cte2 as (
+select mau,
+month,
+lag(mau) over(order by month) as prev_mau
+from cte1
+)
+select mau, 
+month,
+prev_mau,
+100.0 * (mau - prev_mau) / prev_mau as pct_change
+from cte2   
+order by month
+