use test;
drop table if exists emails;
drop table if exists domain;
drop table if exists domain;
create table emails (email varchar(50));
insert into emails values ('sasha@mysql.com'),('monty@mysql.com'),
('foo@hotmail.com'),('foo@aol.com'),('bar@aol.com');
create table domain(id int not null auto_increment primary key,
 domain varchar(50), unique(domain));
insert into domain (domain) select distinct substring(email, locate('@', email)+1) from emails;
@r/3.23/ins000001.result select * from domain;