oracle update语句的几点写法,update两表关联的写法包括字查询

1.oracle update语句第一种写法:

update t2 set parentid=(select ownerid from t1 where t1.id=t2.id);

2. oracle update语句第二种写法:

update tb_client_win_lost_report a set a.rolling_code_id=2
where game_code_id=70000
and exists
(select 'x' from (select a.id
from (select id,level_ from tb_admin_role connect by prior id=parent_id start with id =1) a,
(select lv_id from tb_rolling_plan where rolling_code_id = 2 and game_code_id=70000) b
where b.lv_id=a.id) c where a.role_id=c.id)
and rolling_code_id=1

3.oracle update语句第三种写法:

update (select rolling_code_id from tb_client_win_lost_report a,temp_role_id b
where a.role_id=b.id
and rolling_code_id=1) a set a.rolling_code_id=2;

4. oracle update语句第四种写法:

update tb_client_win_lost_report a set a.rolling_code_id=2
where game_code_id=70000
and exists
(select 'x' from (select id from temp_role_id) c where a.role_id=c.id)
and rolling_code_id=1
and rownum<100000; commit; 5.oracle update语句第五种写法: update 多个字段的写法 update a set (c1,c2,c3) =(select b1,b2,b3 from b where......) where ......;