title: How to use a variable/Parameter with an IN clause in ORACLE SQL
body: <p>I have a simple select query:</p>
  
  <pre><code>SELECT A
  FROM B
  WHERE A IN :conditions
  </code></pre>
  
  <p>where <code>A</code> is a <code>char</code>.</p>
  
  <p>If i do the full query as:</p>
  
  <pre><code>SELECT A
  FROM B
  WHERE A IN ('A','E','I','O','U')
  </code></pre>
  
  <p>it works</p>
  
  <p>but if i use the parameter, when i try to execute with ORACLE SQL Developer i cannot get it to work.</p>
  
  <p>I've already tried to submit the parameter as:</p>
  
  <pre><code>1* ('A','E','I','O','U')
  2* 'A','E','I','O','U'
  3* A,E,I,O,U
  </code></pre>
  
  <p>and query returns no results</p>
  
  <p>What's the correct syntax to do so?</p>
  
  <p>Thank U all</p>