Please help me solve the query

Question

CREATE TABLE SPONSER_UPDATION
MEMBER VARCHAR2(12),
SPONSER VARCHAR2(10),
POINT NUMBER(10)
MEMBER     SPONSER     POINT
a     AS     10
b     a     10
c     b     10
d     c     10
e     d     10
f     e     10
i want a query or trigger on updating a single row all the row corresponding to it also gets updated example if i update a row with member f then its sponser e should also be updated and if sponser is is updatd then its sponser d should also be updated and if d is updated its spnser c should also be updated untill the last one through a single query
i have written the trigger
CREATE OR REPLACE TRIGGER points_updation
AFTER UPDATE
ON sponser_updation
FOR EACH ROW
DECLARE
v_username varchar2(10);
BEGIN
update sponser_updation
set
point=point+10
where
:new.member=:old.sponser;
END;
after updation of any row error message is comming
ORA-04098: trigger 'INVENT.SPONSER_UPDATION1' is invalid and failed re-validation
thanks & Regards,
anuj kumar singh!

Answer 1

You can not insert, delete or update into this trigger type.
try this:
CREATE OR REPLACE TRIGGER points_updation BEFORE UPDATE ON sponser_updation FOR EACH ROW
BEGIN
if :new.member = :old.sponser then
:new.point:=:new.point+10;
end if;
END;