Create find-users-with-valid-e-mails.sql

Author: kamyu104

MySQL/find-users-with-valid-e-mails.sql

@@ -0,0 +1,6 @@
+# Time:  O(n)
+# Space: O(n)
+
+SELECT * 
+FROM   users AS u 
+WHERE  u.mail REGEXP '^[a-zA-Z][a-zA-Z0-9._-]*@leetcode.com$';