For reporting purposes I have to summarize an inventory table in our ERP system by item. It is a simple SELECT SUM and GROUP BY. I would like to create an SQL view over that table to perform the grouping. Is that considered bad practice to create a custom SQL view over an application file? Is it possible that the SQL view will create dependencies or cause performance problems with our ERP system? I only want the view so it can be easily referenced when developing reports. I know it is considered bad practice to create a custom INDEX over an application file, but this would just be an SQL view.