From 237ec043c6996c30a38dfed55e80b58f3f7d5527 Mon Sep 17 00:00:00 2001
From: MichalShany <45390342+MichalShany@users.noreply.github.com>
Date: Tue, 28 Dec 2021 07:36:49 +0200
Subject: [PATCH] Update 1097. Game Play Analysis V.sql

my solution
(in vertica db)
---
 Database hard/1097. Game Play Analysis V.sql | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Database hard/1097. Game Play Analysis V.sql b/Database hard/1097. Game Play Analysis V.sql
index 4104690..7210653 100644
--- a/Database hard/1097. Game Play Analysis V.sql	
+++ b/Database hard/1097. Game Play Analysis V.sql	
@@ -126,4 +126,14 @@ GROUP BY r.event_date
 
 
 
+select i_date install_dt , max(i_count) installs, sum(ind_next_day)/max(i_count) Day1_retention
+from
+  (select *
+  , min(event_date) over(partition by player_id) i_date
+  ,count(player_id) over(partition by event_date) i_count
+  ,case when lead(event_date) over(partition by player_id order by event_date )-1 = min(event_date) over(partition by player_id) then 1 else 0 end ind_next_day
+from Activity) a
+ group by i_date
+
+