Finding top 10 performers each month without table pivot

[ConnorLloyd]

I read the “How to Find the Top Performers Over Time with Table Calculations”  article (https://help.looker.com/hc/en-us/articles/360037537954-How-to-Find-the-Top-Performers-Over-Time-with...) which shows how to find top performers with table pivots. They use this table calculation: if(${order_items.total_sales}>=large(pivot_row(${order_items.total_sales}), 10), ${order_items.total_sales}, null) to find this. I have a column which says the users instead of a pivot like this example, how would I go about applying this table calculation while using a column instead of a pivot_row?