>How can I implement trigger if there are ri already in the table eg.
>
>Daily table already have update trigger : __ri_update_daily()
>
>And I like to perform other tasks at the time this table is updated.
>
>TIA.

You could just compund the trigger statement

__ri_update_daily() AND __my_other_function_here()

Both functions would have to return .T. for the trigger to not fail. If you ORed them together, then only one would.