oracle对没有主键表的新增主键修改表数据操作(没有主键字段，则新增一个主键字段，然后赋值，然后再添加主键)

--新增主键(没有主键字段，则新增一个主键字段，然后赋值，然后再添加主键)
alter table REPORT_ABNORAML  add ID number(11) null;
--删除序列
--drop SEQUENCE SEQ_REPORT_ABNORAML
--增加序列
CREATE SEQUENCE SEQ_REPORT_ABNORAML
INCREMENT BY 1 -- 每次加几个
START WITH 1 -- 从1开始计数
NOMAXVALUE -- 不设置最大值
NOCYCLE -- 一直累加，不循环
NOCACHE;

--设置默认值
UPDATE  REPORT_ABNORAML SET ID=SEQ_REPORT_ABNORAML.nextval;
commit;
--设置主键属性
alter table REPORT_ABNORAML  add primary key (ID);
--更新主键字段不为空
alter table REPORT_ABNORAML MODIFY ID number(11) not null;

--按条件删除此表中重复的数据
delete
from Report_ABNORAML  t
where
t.id in (select id from (
select row_number() over(PARTITION BY t.report_id,t.abnoraml_no order by t.abnoraml_no) as row1,t.id
from REPORT_ABNORAML t
where  1=1
and report_id in (
select report_id FROM
(select ROW_NUMBER() OVER(PARTITION BY customer_id ORDER BY report_time desc,report_id desc) as Row1,
report_id,customer_id,orgain_id from report_info
where 1 = 1  and orgain_id in (1) /*and report_time >= to_char('2015-04-01')
and report_time < to_char('2015-09-01') and customer_id in (select customer_id from customer_info
where work_unit in ('第三采油厂') */) )TT where TT.Row1 = 1)
)a where a.row1!=1);
commit;

--删除列
alter table REPORT_ABNORAML drop COLUMN ID ;