如何使用Min（）和Where（）SQL函數獲取最早的記錄？

Question

我正在嘗試最早提起記錄，但是我一直遇到錯誤。 我以為可以在WHERE子句中執行此操作，但是我錯了。 如何在符合我代碼中當前兩個條件的位置提取數據？

left outer join 
(SELECT
[RID]
,[p_rid]
,[Budget Records.Budget ID]
,[Budget Records.Budget approval process]
,[Budget Records.Inflation base date]
,[Budget Records.Budget Stage]

,CAST(ISNULL([Budget Records.Total capital budget],0) as float) as [CAR Total capital budget]

FROM [FSG_DATA_TEAM].[dbo].[BR]
WHERE [Budget Records.Budget Stage] in ('Cost Plan 1') and min([Budget Records.Inflation base date])) as y

我得到的輸出是“在預期有條件的上下文中，在'）'附近指定的非布爾類型的表達式”，但我希望返回的值取決於最早的通脹基准日期。

Answer 1

如果數據庫支持使用窗口分析功能（似乎是SQL-Server ），則可以將查詢的上述部分轉換為：

left outer join 
(
    SELECT *
    (
     SELECT
          [RID]
          ,[p_rid]
          ,[Budget Records.Budget ID]
          ,[Budget Records.Budget approval process]
          ,[Budget Records.Inflation base date]
          ,row_number() over (order by [Budget Records.Inflation base date]) as rn
          ,[Budget Records.Budget Stage]
          ,CAST(ISNULL([Budget Records.Total capital budget],0) as float) as [CAR Total capital budget]
      FROM [FSG_DATA_TEAM].[dbo].[BR]
     WHERE [Budget Records.Budget Stage] in ('Cost Plan 1') 
    ) 
    WHERE rn = 1
) as y   

由於[Budget Records.Inflation base date]列的最小值，限制了結果。