title: Informatica Expression IIF
body: <p>I have this set of codes in my Informatica expression</p>
  
  <pre><code>IIF(V_TR = 'TT'
  OR
  V_TR = 'TV'
  OR
  V_TR = 'VC'
  OR
  V_TR = 'TI'
  OR
  V_TR = 'TL'
  OR
  V_TR = 'NC'
  OR
  V_TR = 'CE'
  OR
  V_TR = 'D1'
  OR
  V_TR = 'DM'
  OR
  V_TR = 'N1'
  OR
  V_TR = 'NA'
  OR
  V_TR= 'U1'
  OR
  V_TR = 'UA', 'Y', 'N')
  </code></pre>
  
  <p>I know what the code means but what exactly does it do in the expression? DOes it serve as a filter to filter out all these values?</p>