title: What does the colon sign ":" do in a SQL query?
body: <p>What does <code>:</code> stand for in a query?</p>
  
  <pre><code>INSERT INTO MyTable (ID) VALUES (:myId)
  </code></pre>
  
  <p>How does it fetch the desired value?</p>
  
  <p><strong>Edit:</strong> Also what is that sign called? I wanted to search on google, but what's the name for <code>:</code>?</p>