create or replace trigger chufa
after insert on B when :old.a=1
for each row
begin
insert into [email protected] values(:new.a);
end chufa;
after insert on B when :old.a=1
for each row
begin
insert into [email protected] values(:new.a);
end chufa;
insert into [email protected] values(:new.a);
exception
这里再做你想要做的事情...