Create users-that-actively-request-confirmation-messages.sql

Author: kamyu104

MySQL/users-that-actively-request-confirmation-messages.sql

@@ -0,0 +1,14 @@
+# Time:  O(nlogn)
+# Space: O(n)
+
+WITH confirmation_time_cte AS
+  (SELECT user_id,
+          TIMESTAMPDIFF(SECOND,
+                        time_stamp,
+                        LEAD(time_stamp, 1) OVER (PARTITION BY user_id
+                                                  ORDER BY time_stamp)) AS time_diff
+   FROM Confirmations)
+
+SELECT DISTINCT user_id
+FROM confirmation_time_cte
+WHERE time_diff <= 86400;