title: What does the old-style JOIN syntax mean in T-SQL?
body: <p>I need to edit old-styled T-SQL code.</p>
  
  <ul>
  <li><p>What does <code>=*</code> mean?</p></li>
  <li><p>What does <code>*=</code> mean?</p></li>
  </ul>
  
  <p>I think, that they are JOIN, but I don't know, what JOIN type is each of them.</p>