title: how to do reduce multiple query into one query
body: <pre><code>Query 1: select item_no from hdd where item_no='$in' and id != '$id'
  
  Query 2: select sr from hdd where sr='$hd'
  
  Query 3: select item_no from hdd where casing_no='$c' and id != '$id'
  </code></pre>
  
  <p>Result Required : </p>
  
  <pre><code>Q1 = num_rows = 0
  Q2 = num_rows &lt;&gt; 0
  Q3 = num_rows = 0
  </code></pre>
  
  <p>How can perform above task in single query ? ?</p>
  
  <p>Done this :</p>
  
  <pre><code>SELECT id FROM hdd WHERE status='1' AND item_no='$in' AND FIND_IN_SET('$hd', sr)&lt;&gt;0 AND casing='$c' AND id&lt;&gt;'111'
  </code></pre>