create or replace trigger userinfo_trigger
before update on userinfo for each row
begin
:new.modify_time := to_char(sysdate,'YYYYMMDDHH24MISS');
end;
userinfo:是表名
modify_time:执行update需要自动更新的字段
create or replace trigger userinfo_trigger
before update on userinfo for each row
begin
:new.modify_time := to_char(sysdate,'YYYYMMDDHH24MISS');
end;
userinfo:是表名
modify_time:执行update需要自动更新的字段