Oracle(Sequence、Trigger、Procedure、Job)

1. 序列:sequence，实现功能，实现主键的自增长（sqlserver可直接设定），hibernate也做了实现

Create sequence
create sequence SNIPER_TEST_SQS
minvalue 1
maxvalue 999999999999
start with 1
increment by 1
cache 10;

在表中的应用

insert into sniper_test (id,name,degree,address) values (sniper_test_sqs.nextval,'张三','学士','山东');
commit;

2.触发器：trigger，用触发器的方式实现上边的内容

CREATE OR REPLACE TRIGGER SNIPER_TEST_TRIG
BEFORE INSERT ON SNIPER_TEST
FOR EACH ROW
BEGIN
SELECT SNIPER_TEST_SEQUENCE_1.NEXTVAL INTO :NEW.ID FROM DUAL;
END;

3.存储过程：procedure

create or replace procedure PC_SNIPER_TEST
is
begin
insert into sniper.sniper_test (id,name,degree,address) values ('','张三','学士','山东');
commit;
end;

4.定时器Job， 创建job，每隔一分钟定时执行，每隔一份中执行时，时间会有延迟，一般要63秒左右才能定时执行一次，目前没有好的解决方法*

begin
sys.dbms_job.submit(job => :job,
what => 'PC_SNIPER_TEST;',
next_date => to_date('13-08-2012 14:20:39', 'dd-mm-yyyy hh24:mi:ss'),
interval => 'SYSDATE+1/(24*60)');
commit;
end;
/