Oracle自动增量[重复]

问题描述

|                                                                                                                   这个问题已经在这里有了答案：                                                      

解决方法

您需要一个序列：

create sequence seq_user_id start with 1 increment by 1;

和桌子上的触发器

CREATE TRIGGER user_id_trg 
   BEFORE insert 
   ON sample 
   FOR EACH ROW
BEGIN
      SELECT seq_user_id.NEXTVAL INTO :new.user_id FROM dual;

END;
/