-- Create sequence
create sequence INNERID
minvalue 1
maxvalue 99999999999999
start with 1
increment by 1
cache 20
order;
2.--INNERID.currval 指当前序列
--INNERID.nextval 指下一个序列
create table admin (
id varchar2(20),
name varchar2(10)
);
insert into admin values (INNERID.nextval,'a');
insert into admin values (INNERID.nextval,'b');
insert into admin values (INNERID.nextval,'c');
insert into admin values (INNERID.nextval,'d');
--不断的插入序列的下一个值.
3.创建触发器(注意这里无法设置id的默认值为INNERID.nextval )
CREATE OR REPLACE TRIGGER admin_tg --admin id 的触发器
BEFORE INSERT ON admin FOR EACH ROW
BEGIN
SELECT INNERID.NEXTVAL INTO :NEW.id FROM DUAL;
END;
测试语句
insert into admin (username) values ( 'zdz');