title: How represent multiple similar foreign keys in ERD database diagram?
body: <p>I'm making an ERD of my database, and am stuck with a little dilemma.</p>
  
  <p>Consider the tables <code>foo</code> and <code>bar</code>. <code>foo</code> has three columns that are foreign keys, referencing to <code>bar</code>'s primary key. My question is: in the ERD do I represent this with just one line between those two tables, or do I use three lines? </p>