title: ER-Diagram: Ternary Relationship - How to read properly?
body: <p>Im not quite sure how to read ternary relationships within a ER-Diagram.
  Lets say this is the ternary relationship that is given.
  What can I interpret out of that?</p>
  
  <p><img src="https://i.stack.imgur.com/xSmIS.png" alt="account-user-project three-way relation"></p>
  
  <p>It says that you have to put your hand on 2 entity sets and then read it like that.</p>
  
  <p>Hand on Account and User:
  A pair of Account and User can be associated with M projects.</p>
  
  <p>Hand on Account and Project:
  A pair of Account and Project can be associated with M users.</p>
  
  <p>Hand on Project and User:
  A pair of Project and User can be associated with 1 Account.</p>
  
  <p>Are the pairs always in a one to one relationship or how many pairs can there be?</p>