title: Presto / MySQL - Regex to check column values are alphanumeric or not
body: <p>I am looking to get only alphanumeric values in the column. I have tried following Presto query but I am still getting numeric and alphanumeric values.</p>
  
  <p>Query:</p>
  
  <pre><code>select 
     seller_id
  from 
     myTable 
  where 
    logdate = '2019-10-07'
    and regexp_like(seller_id,'^[a-z0-9A-Z]+$')
  </code></pre>
  
  <p>Actual Result:</p>
  
  <pre><code>12345
  f7c865ff
  1003147
  c743a319
  z87wm
  google
  </code></pre>
  
  <p>Expected Result:</p>
  
  <pre><code>f7c865ff
  c743a319
  z87wm
  google
  </code></pre>
  
  <p>Can anyone help how I can improve this so I can only get alphanumeric values?</p>