Redshift 更新内连接

Posted 2023-03-30

【中文标题】Redshift 更新内连接

【英文标题】：Redshift update innerjoin

【发布时间】：2019-10-23 08:49:38

【问题描述】：

我想更新新状态

此选择有效：

select cd.referenceid,  cd.productstate , cd.date, dateadd(day,-1,cd.date) as gestern, cd2.date as cd2date, cd2.productstate, cd.statenew
from public.contractdaily  cd
left join public.contractdaily cd2 on cd2.contractid = cd.contractid and dateadd(day,-1,cd.date) = cd2.date
where cd.productstate != cd2.productstate and cd.referenceid = 201663

这不起作用

update contractdaily  set stateNew = 1
from
(select  cd.stateNew ,cd.referenceid,  cd.productstate as cd1productstate , cd.date, dateadd(day,-1,cd.date) as gestern, 
cd2.date as cd2date, cd2.productstate as cd2productstate, cd.referenceid as cdreferenceid
from contractdaily  cd
left join contractdaily cd2 on cd2.contractid = cd.contractid and dateadd(day,-1,cd.date) = cd2.date )foo
where contractdaily.productstate !=  foo.cd2productstate  and contractdaily.referenceid = 201663;

错误：亚马逊无效操作：目标表必须是一部分 等值连接谓词； [SQL 状态=XX000，数据库错误代码=500310]

【参考方案1】：

也许这会有所帮助：

update contractdaily
set stateNew = 1
where referenceid = 201663
and productstate not in
(
select cd2.productstate 
from contractdaily cd
left join contractdaily cd2 on cd2.contractid = cd.contractid and dateadd(day,-1,cd.date) = cd2.date
);