title: What is the rule of order by with special character?
body: <p><a href="https://i.stack.imgur.com/GR2BZ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GR2BZ.png" alt="enter image description here" /></a></p>
  <p>I sort my data with <code>select pk_customer_no from customer order by pk_customer_no</code>
  The code with '-', didn't group together and sort by letter, It seems sql just ignore it and sort by the third letter.</p>
  <p>How can I sort by the '-'?</p>