oracle 创建自动增加主键的表

//创建表

create table t (pk number primary key,name varchar2(20));

//创建序列

create sequence t_seq

increment by 1

start with 1 maxvalue 999999999;

//创建触发器

create trigger t_trigger before insert on t for each row

begin

select t_seq.nextval into :new.pk from dual; //or ( new.pk=t_seq.nextval)

end;

//插入记录

insert into t(name) values('aa');