title: Sql question marks in insert statement
body: <p>This may seem a very rudimentary question but I am not clear about it. In my code I have a query </p>
  
  <pre><code>    "insert into CONTACTS (EMAIL, FIRSTNAME, LASTNAME, TELEPHONE) values (?, ?, ?, ?)"
  </code></pre>
  
  <p>What is the '?' in the values, is it to fetch the real time values?</p>