title: How can combine the values of multiple columns to a single comma separated column in Oracle SQL?
body: <p>I need to create a column that has all the values from the previous columns combined and separated using commas ', '</p>
  
  <p>I can't use listagg since I'm trying to combine multiple columns instead of rows.</p>
  
  <p>below is an example of how the result column should look like, thanks.</p>
  
  <p><a href="https://i.stack.imgur.com/HuABw.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HuABw.png" alt="Example"></a></p>