Create 1613-find-the-missing-ids.sql

Author: everthis

1613-find-the-missing-ids.sql

@@ -0,0 +1,12 @@
+# Write your MySQL query statement below
+WITH RECURSIVE id_seq AS (
+    SELECT 1 as continued_id
+    UNION 
+    SELECT continued_id + 1
+    FROM id_seq
+    WHERE continued_id < (SELECT MAX(customer_id) FROM Customers) 
+)
+
+SELECT continued_id AS ids
+FROM id_seq
+WHERE continued_id NOT IN (SELECT customer_id FROM Customers);