title: Firebird: Using global variable
body: <p>I would like to assign a value to a variable which is used in an sql code in firebird. The MySQL-Code would be:</p>
  
  <pre><code>SET @x = 1;
  SELECT @x;
  </code></pre>
  
  <p>What is the correspondent Firebird-Code?</p>
  
  <p>Thanks for help.</p>