I have a table called product, it has 4 columns. Product 1 desc, Product 2 desc, product 3 desc and Product 4 desc with respective product codes for each level.
Please find the below screenshot.
Above products are coming from different levels. We have 30 products which are coming from different levels. I need to combine all the products so that I can show products in ONE SHEET.
Your request is very unclear. I would suggest taking a read at this post: Why Your Question Didn't Get Answered
It would be extremely beneficial some sample data and a mock up of your desired result as it stands it is very vague and difficult to understand your need. Remember we don't know your work like you do.