Thanks for the description.While you do the Obj-Browse, you can add the filter condition of that particular column of the work table. Like suppose consider, you want to change the work objects any column value from A to B.
Do a Obj-Browse with the filter condition of "A" on work table. Then you will get the list of work objects and looping over that list, you can update the value to "B" and save to database.
Hope this will help you. If any additional information needed, please let me know.