Oracle|Oracle主键自增设置

--创建表
CREATE TABLE tb_demo
(
id INT NOT NULL,
key1 VARCHAR2(40) NULL,
key2 VARCHAR2(40) NULL
);
--设置主键
alter table tb_demo add constraint tb_demo_pk primary key (id);
--新建序列
create sequence tb_demo_id
minvalue 1
nomaxvalue
increment by 1
start with 1
nocache;


--新建触发器
create or replace trigger tb_demo_tg_insertId
before insert on tb_demo for each row
begin
select tb_demo_id.Nextval into:new.id from dual;
end;

--插入数据
insert into tb_demo (key1, key2)
values ('key1', 'key2');
insert into tb_demo (key1, key2)
values ('key11', 'key22');

--查询表
select * from tb_demo;
【Oracle|Oracle主键自增设置】
--查询当前序列值
select tb_demo_id.currval from dual;

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