从具有多个属性的选择查询中获取单个投影

Question

我正在尝试编写一个查询，该查询将对已经为GROUP BY BY update_winnerlist的视图item_index执行以下操作：

SELECT email_id
(SELECT email_id, MIN(bid_amount)
   FROM update_winnerslist AS a1
  WHERE a1.item_index = 10 )

我需要在单个查询中执行上述操作，因为我在触发器中使用它来更新表。

Answer 1

select top 1 email_id from update_winnerslist
 where item_index = 10 order by bid_amount desc