SQL 子查詢：select 所有值，但對於一種類型的值僅高於

Question

是否有可能獲得所有貨幣的所有價值，但對於一種特定貨幣，只有那些高於 10000 美元的貨幣？

select case
    when currency_id = '57' then 'EUR'
    when currency_id = '26' then 'USD'
    when currency_id = '51' then 'HKD' end as CCY,
    amount, ECPNBR, value_date
    from money_transfer
    where (select amount from money_transfer where currency_id ='26')>10000 order by amount desc;

這得到錯誤“子查詢返回超過 1 個值...”

Answer 1

也許像下面這樣提出您的查詢

select 
 case
  when m.currency_id = '57' then 'EUR'
  when m.currency_id = '26' then 'USD'
  when m.currency_id = '51' then 'HKD'
  else '' 
 end,
 m.amount, m.ECPNBR, m.value_date
from money_transfer  where ( m.currency_id='26' and m.amount>10000) OR (m.currency_id<>'26')
order by m.amount desc;