//触发器
 
create or replace trigger 触发器名称
 before insert on 表名称
 
for each row
 
declare
 
begin 
 
if :NEW.id like '50%' and :New.display <> '0' and
 
:NEW.state <> '1' then
 
:NEW.display :=0;
 
:NEW.state :=1
 
:NEW.person :='张三'
 
end if;
 
end;