更改子查询中的值时出现问题

Question

我正在尝试将items.unit_price，在子查询中将其值增加10％，然后将其显示在另一列中。

这里是我的代码

select items.title, items.unit_price, items.unit_price as Price_increase 
from artists 
join items 
on items.artist_id = artists.artist_id 
order by price_increase in 
(
    select distinct round(items.unit_price + (items.unit_price * 0.1), 2) as Price_increase 
    from artists 
    where artists.artist_name = "No Rest For The Weary" 
) 
; 

Answer 1

这是你想要的吗？

select i.title, i.unit_price, 
     (case when a.artist_name = 'No Rest For The Weary' 
      then 1.1*i.unit_price else i.unit_price 
     end) as Price_increase 
from artists a join 
    items i 
    on i.artist_id = a.artist_id 
order by price_increase;