title: Is it a Many to one or one to one relationship?
body: <p>I am struggling to wrap my head around this concept. Here is a pic of my ERD
  <img src="https://i.stack.imgur.com/nL7MS.png" alt="ERD" /></p>
  <p>Look at the tables 'Titles' and 'Employees'. Emp_title_id is a foreign key reference to title_id in Title. Now, there are same titles for multiple employees. So shouldn't that be a many-to-one relationship?
  The argument against is that the two fields (emp_title_id in Employees and title_id in Title) have same set of values, so it is a one-to-one relationship.</p>
  <p>Please let me know if I should think of it as set of values (one to one) or set of &quot;cells&quot; with different values (many to one)</p>
  <p>Thanks</p>