使用另一個表中的數據更新sql表列

Question

UPDATE [APL4_WATERPLANT].[dbo].[PRINT_PWD] 
SET [APL4_WATERPLANT].[dbo].[PRINT_PWD].[CLT_2101] = ([APL4_WATERPLANT].[dbo].[PWD].[CLT_2101] 
FROM [APL4_WATERPLANT].[dbo].[PWD] 
WHERE [APL4_WATERPLANT].[dbo].[PWD].[DATEANDTIME] = '2013-8-13 12:00:00.000') 

每當我嘗試執行此代碼時，我收到一條錯誤消息。可能是什麼問題呢 ？

Answer 1

試試這個

UPDATE [APL4_WATERPLANT].[dbo].[PRINT_PWD] 
SET [APL4_WATERPLANT].[dbo].[PRINT_PWD].[CLT_2101] = (select CLT_2101 
FROM [APL4_WATERPLANT].[dbo].[PWD] 
WHERE DATEANDTIME = '2013-8-13 12:00:00.000') 

Answer 2

我認爲選擇從子查詢丟失： -

UPDATE [APL4_WATERPLANT].[dbo].[PRINT_PWD] 
SET  [APL4_WATERPLANT].[dbo].[PRINT_PWD].[CLT_2101] = 
      (
       select [APL4_WATERPLANT].[dbo].[PWD].[CLT_2101] 
       FROM [APL4_WATERPLANT].[dbo].[PWD] 
       WHERE [APL4_WATERPLANT].[dbo].[PWD].[DATEANDTIME] = '2013-8-13 12:00:00.000' 
     )