Transactions are used to save "all or nothing", usually in more than one table.
Typical scenario:
begin transaction
if TableUpdate(.T., .F., "Table1") and TableUpdate(.T., .F., "Table2")
end transaction
else
rollback
endif
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)