oracle int自增长
1. 先建表（此处略去）
2. 创建Sequence

  create sequence template_seq  start with 1  increment by 1  nocycle  cache 99999  

create trigger template_trig beforeinsert on template for each row--template是表名declarenextid number;beginif:new.templateid is null or :new.templateid=0 then--templateid是template表的列select template_seq.nextval into nextid from sys.dual;:new.templateid:=nextid;end if;end;