title: Deleting a row with mysql
body: <p>I am trying to delete a record of <code>richiestePreventivo</code> but when I do this Sql code in phpmyadmin I have 0 rows deleted:</p>
  
  <pre><code>DELETE FROM `RichiestePreventivo` as `p` WHERE (`p`.`idImpresa` = 17)
  </code></pre>
  
  <p>In <code>richiestePreventivo</code> I have one record containing:</p>
  
  <pre><code>id  idPrivato   idImpresa   data_invio
  13  11          17          2011-08-25
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/ZnM6p.png" alt="my database"></p>
  
  <p>What is the problem?</p>