Create 196-delete-duplicate-emails.sql

everthis · web-flow · commit 551895591084 · 2019-01-08T13:28:57.000+08:00
diff --git a/196-delete-duplicate-emails.sql b/196-delete-duplicate-emails.sql
@@ -0,0 +1,5 @@
+# Write your MySQL query statement below
+DELETE p1
+FROM Person p1, Person p2
+WHERE p1.Email = p2.Email AND
+p1.Id > p2.Id
