title: SQL - Subquery (Column names)
body: <p>I need a select query thats returns the value of some columns.
  The column that I want starts with 'U_S'. </p>
  
  <pre><code>Select * from em
  </code></pre>
  
  <p>I need to transform the query above. The '*' needs to be the result (but with commas) of:</p>
  
  <pre><code>select COLUMN_NAME from information_schema.columns 
  where table_name='em' and column_name like 'u_s%'
  </code></pre>