如何根據 SQL Server 中的條件派生新列？

Question

我有下表。

我希望根據這些條件編寫一個 SQL 查詢：其中階段是篩選，狀態是最小數據（實際上是它的日期）狀態 =（選擇/拒絕/刪除）作為面試日期

Answer 1

嘗試這個

select 
    t1.stage, t1.status, t2.data 
from 
    table as t1 
inner join
    (select 
         stage, min(data) as data 
     from 
         table 
     group by 
         stage) as t2 on t1.stage = t2.stage and t1.data = t2.data