Update 50-01517-find-users-with-valid-emails.sql

Author: leetlab11

50-01517-find-users-with-valid-emails.sql

@@ -1 +1,11 @@
+-- regexp pattern
+-- ^ = starting should be this
+-- * = can be any number of characters
+-- [.] = should be a dot
+-- $ = end- no characters after this
 
+select *
+from Users
+where mail regexp '^[A-Za-z][A-Za-z0-9_.-]*@leetcode[.]com$'
+
+-- no companies listed