title: Creating UNIQUE constraint on multiple columns in MySQL Workbench EER diagram
body: <p>In MySQL Workbench's EER diagram, there is a checkbox to make each column in a table unique, not null, primary key etc.</p>
  
  <p>However, I would like to have a UNIQUE constraint on multiple columns. Is it possible to add it in in MySQL Workbench's EER diagram?</p>
  
  <p>EDIT: Ok, I realised the unique checkbox, creates a UNIQUE INDEX, and not a UNIQUE CONSTRAINT</p>