Oracle Sequence与Trigger的使用

一：建立sequence

-- Create sequence
create sequence SEQ_PUSH
minvalue 1
maxvalue 9999999999
start with 1
increment by 1
cache 20;

二：建立Trigger

　　在向t_push表中插入一条数据时，ID自动赋值

create or replace trigger tr_id_insert
  before insert on t_push
  for each row
declare
  -- local variables here
begin
  select seq_user_id.nextval into :new.id from dual;
end tr_id_insert;