orcle数据库[通俗易懂]

--创建触发器 trigger_ssq_insert：
create or replace trigger trigger_ssq_insert
  before insert on  ssq
  for each row
declare
  str varchar2(30);
  str1 varchar2(2);
begin
  :new.kjyear := substr(:new.kjno,1,4);
  :new.sum := to_number(:new.red1)+to_number(:new.red2)+to_number(:new.red3)+to_number(:new.red4)+to_number(:new.red5)+to_number(:new.red6);
  :new.red := to_char(:new.red1)||','||to_char(:new.red2)||','||to_char(:new.red3)||','||to_char(:new.red4)||','||to_char(:new.red5)||','||to_char(:new.red6);
end;