plsql - After a trigger is executed on one table, is it possible to display the values of a column from another table? (PL/SQL) -

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i have trigger execute when table updated. trigger updates table. i'd display changes of second table.

this code have:

create or replace trigger update_club_fee after update of fee on sporting_clubs each row  begin  update club_membership set amount = (duration*:new.fee) :old.club_id = :new.club_id;  dbms_output.put_line('customer id is: '||:new.customer_id); dbms_output.put_line('previous amount '||:old.amount); dbms_output.put_line('new amount '||:new.amount); end;

i don't think trigger appropriate tech solution. ui code captures change club membership should propagate changes child tables , deliver reporting.

but if need use triggers, it's not going possible quite that:

  1. you cannot reference :old , :new on club_membership - these records relate trigger's owning table (sporting_clubs in case). :old.amount not resolve
  2. an update on 1 row in sporting_clubs may result in many rows being updated in club_membership (each club has more 1 member, right?). presume want know each row

i write procedure accepts club_id , fee. update related rows in club_membership , report on updated rows. call procedure trigger.

but, please, don't use triggers this.


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