finish Confirmation Rate

Author: babebp

SQL/SQL-50/Confirmation_Rate.sql

@@ -0,0 +1,9 @@
+select s.user_id, 
+CASE
+    WHEN c.time_stamp is null THEN 0.0
+    ELSE round(avg(c.action = "confirmed"), 2)
+END as confirmation_rate
+from Signups s
+left join Confirmations c
+on s.user_id = c.user_id
+group by s.user_id;