diff --git a/0550-game-play-analysis-iv/0550-game-play-analysis-iv.sql b/0550-game-play-analysis-iv/0550-game-play-analysis-iv.sql
new file mode 100644
index 0000000..5a5b1e9
--- /dev/null
+++ b/0550-game-play-analysis-iv/0550-game-play-analysis-iv.sql
@@ -0,0 +1,10 @@
+# Write your MySQL query statement below
+#SELECT * FROM (SELECT player_id, event_date FROM Activity ORDER BY event_date DESC) a GROUP BY player_id;
+
+#SELECT player_id, event_date FROM Activity ORDER BY event_date DESC
+
+#SELECT DISTINCT(player_id) FROM Activity;
+
+#SELECT player_id,  FROM Activity GROUP BY player_id;
+
+SELECT ROUND((COUNT(*)/(SELECT COUNT(DISTINCT(player_id)) FROM Activity)),2) AS fraction FROM (SELECT player_id, MIN(event_date) AS first_log, (SELECT MIN(event_date) FROM Activity WHERE player_id = a1.player_id AND event_date > (SELECT MIN(event_date) FROM Activity WHERE player_id = a1.player_id)) AS second_log FROM Activity a1 GROUP BY player_id) logs WHERE DATEDIFF(second_log, first_log) = 1;
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