单行子查询返回多行

Question

我收到以下错误：“单行子查询返回多行”，同时尝试执行以下查询：

select * 
from wm_inventory 
where item_id =(select item_cbo.item.id  
                from item_cbo 
                where item_name in ('564310','140270'));

Answer 1

更改为：

select * 
from wm_inventory 
where item_id   in  (select item_cbo.item.id  
                from item_cbo 
                where item_name in ('564310','140270'));

您无法为＆＃34; =＆＃34;返回多行操作

Answer 2

错误非常明显。使用in：

select i.* 
from wm_inventory i 
where i.item_id in (select item_cbo.item.id  
                    from item_cbo 
                    where item_name in ('564310', '140270')
                   );