oracle 生成自增序列

创建序列

CREATE SEQUENCE  "HSSP_DEV"."HSS_TASK_PAY_BILL_S"  MINVALUE 1 
MAXVALUE 9999999999999999999999999999 INCREMENT BY 1 START WITH 1 CACHE 20 NOORDER  NOCYCLE ;

HSS_TASK_PAY_BILL_S 为序列名 ，表示从1到 9999999999999999999999999999 步长为1进行递增

创建定时器

create or replace trigger HSS_TASK_PAY_BILL_T
before insert on HSS_TASK_PAY_BILL
for each 
row
begin
     select  HSS_TASK_PAY_BILL_S.NEXTVAL into:new.TASK_PAYMENT_ID from dual;
end;

HSS_TASK_PAY_BILL为表名 ，TASK_PAYMENT_ID为需要自增的字段