oracle设置自动增长列

1.建表

create table VACATION
(
  ID        number(8) primary key,
  TITLE     VARCHAR2(200),
  MATTER    VARCHAR2(200),
  APPLYER   VARCHAR2(20),
  STARTTIME VARCHAR2(20),
  ENDTIME   VARCHAR2(20)
)

2.建序列

create sequence vacation_seq minvalue 1 maxvalue 999999999999999999 start with 1 increment by 1 cache 20;

3.建触发器

CREATE OR REPLACE TRIGGER "vacation_trig" 
  BEFORE INSERT ON VACATION  
  REFERENCING OLD AS OLD NEW AS NEW FOR EACH ROW   
DECLARE 
BEGIN 
  SELECT vacation_seq.NEXTVAL INTO :NEW.id FROM DUAL;  
END vacation_trig;

搞定！