SQL變量的動態表名更改與獲取日期

Question

我有以下的SQL，我不能工作，有一個表，它每天創建與YYYYMMDD格式在表名每天結束。 這裏是SQL：

DECLARE @var INT 



    SET @var = CAST(CONVERT(NVARCHAR(8),GETDATE()-1,112) AS int) 

    SELECT @VAR 


    SELECT 
    CASE WHEN LEN("AssociatedData") = 0 OR "AssociatedData" IS NULL THEN '*Unknown*' ELSE AssociatedData END AS AssociatedData, 
    "CallEvent", 
    CASE WHEN LEN("CallEventName") = 0 OR "CallEventName" IS NULL THEN '*Unknown*' ELSE CallEventName END AS CallEventName, 
    "CallID", 
    CASE WHEN LEN("Destination") = 0 OR "Destination" IS NULL THEN '*Unknown*' ELSE Destination END AS Destination, 
    CASE WHEN LEN("EventData") = 0 OR "EventData" IS NULL THEN '*Unknown*' ELSE EventData END AS EventData, 
    "FirstEventTimestamp", 
    "SequenceNumber", 
    "Source", 
    CASE WHEN LEN("TelsetLoginID") = 0 OR "TelsetLoginID" IS NULL THEN '*Unknown*' ELSE TelsetLoginID END AS TelsetLoginID, 
    "Time", 
    "Timestamp" 
    FROM concat(eCallByCallStat,@var) 

我需要得到這個工作的SQL查詢，而不是一個StoredProcedure的。

這是否可能在表名後直接附加datekey。

謝謝

Answer 1

DECLARE @tsql VARCHAR(MAX) 
DECLARE @var DATE = GETDATE() - 1 

SET @tsql = ' 
SELECT 
    [AssociatedData] = CASE WHEN LEN([AssociatedData]) > 0 THEN [AssociatedData] ELSE ''*Unknown*'' END, 
    [CallEvent], 
    [CallEventName] = CASE WHEN LEN([CallEventName]) > 0 THEN [CallEventName] ELSE ''*Unknown*'' END, 
    [CallID], 
    [Destination] = CASE WHEN LEN([Destination]) > 0 THEN [Destination] ELSE ''*Unknown*'' END, 
    [EventData] = CASE WHEN LEN([EventData]) > 0 THEN [EventData] ELSE ''*Unknown*'' END, 
    [FirstEventTimestamp], 
    [SequenceNumber], 
    [Source], 
    [TelsetLoginID] = CASE WHEN LEN([TelsetLoginID]) > 0 THEN [TelsetLoginID] ELSE ''*Unknown*'' END, 
    [Time], 
    [Timestamp] 
FROM 
    ' + CONCAT('eCallByCallStat', CONVERT(VARCHAR, @var, 112)) 

PRINT @tsql 
EXEC sp_executesql @tsql