title: Check if any column is NOT NULL
body: <p>I need to check whether a column is NOT NULL in my SQL statement. </p>
  
  <p>My SQL query:</p>
  
  <pre><code>select column_a, column_b, column_c, column_d, column_x
  from myTable
  </code></pre>
  
  <p>I've a lot of columns in my select. So I've got a performance issue, If I would do the following:</p>
  
  <pre><code>select column_a, column_b, column_c, column_d, column_x
  from myTable
  where column_a is not null or column_b is not null or column_c is not null 
  or column_x  is not null
  </code></pre>
  
  <p>Is there another (better) way to check if there are any columns that are NOT NULL?</p>