text: 
  drop table if exists titles_test;
  CREATE TABLE  titles_test (
     id int(11) not null primary key,
     emp_no  int(11) NOT NULL,
     title  varchar(50) NOT NULL,
     from_date  date NOT NULL,
     to_date  date DEFAULT NULL);
  
  insert into titles_test values
  ('1', '10001', 'Senior Engineer', '1986-06-26', '9999-01-01'),
  ('2', '10002', 'Staff', '1996-08-03', '9999-01-01'),
  ('3', '10003', 'Senior Engineer', '1995-12-03', '9999-01-01'),
  ('4', '10004', 'Senior Engineer', '1995-12-03', '9999-01-01'),
  ('5', '10001', 'Senior Engineer', '1986-06-26', '9999-01-01'),
  ('6', '10002', 'Staff', '1996-08-03', '9999-01-01'),
  ('7', '10003', 'Senior Engineer', '1995-12-03', '9999-01-01');
  