After an INSERT/UPDATE (in a trigger), I need to take all fields in INSERTED cursor and concatenate them in one variable to place the result into a text field name DETAIL in a table named JOURNAL. How to do that?

P.S.: The difficulty here is that I need all the columns but I don't know their names (it will ne a general stored proc - it can be called from any updated table). Then I must to use sysobjects and syscolums tables.