在Oracle数据库中使用触发器和序列实现主键自增
发布时间:2020-12-12 15:29:41 所属栏目:百科 来源:网络整理
导读:一、创建序列 create sequence SEQ_USER_IDminvalue 1maxvalue 99999999999start with 1increment by 1; 二、创建数据库表 create table MS_USER( user_id number(11) not null primary key,mobile_phone varchar2(16) not null,user_name varchar2(32) not
一、创建序列create sequence SEQ_USER_ID minvalue 1 maxvalue 99999999999 start with 1 increment by 1; 二、创建数据库表create table MS_USER( user_id number(11) not null primary key,mobile_phone varchar2(16) not null,user_name varchar2(32) not null ); -- 增加数据库表备注和表字段的备注信息 comment on table MS_USER is '用户信息表'; comment on column MS_USER.user_id is '用户ID'; comment on column MS_USER.mobile_phone is '手机号码'; comment on column MS_USER.user_name is '用户名称'; 三、创建触发器create or replace trigger MS_USER_TRIGGER before insert on MS_USER for each row begin select SEQ_USER_ID.nextval into :new.user_id from dual; end ; / 四、测试插入记录: insert into MS_USER(mobile_phone,user_name) values('12345678901','Kevin'); 查询记录: select * from ms_user; (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |