title: Mysql: use value as alias in query
body: <p>given a table</p>
  
  <pre><code>create table mymy(A int(2),B int(2))
  </code></pre>
  
  <p>is it possible to use a field value as an alias? Something like (not really):</p>
  
  <pre><code>select A as valueOf(B) from mymy.
  </code></pre>