DateAdd函數原因語法錯誤從字符串轉換datetime

當我在Visual Studio中執行下面的查詢，從Visual Basic，它運行正常，並返回我的數據。但是，當我寫我的代碼填寫查詢它變得異常DateAdd函數原因語法錯誤從字符串轉換datetime

語法錯誤從字符串轉換日期時間

我認爲錯誤是where條款

這是我的查詢中：

SELECT  Maint_TaskSheetDetails.TaskId, 
DATEADD(dd, (SELECT  MaintenanceRate 
           FROM   Maint_ItemTasks 
           WHERE  (TaskId = Maint_TaskSheetDetails.TaskId)), 
Maint_TaskSheets.SheetMaintenanceDate) AS Expr1, Maint_ItemTasks_5.TaskName, 
         Maint_Items.ItemName, All_CostCenter.CostCenterName 
FROM   Maint_TaskSheets INNER JOIN 
         Maint_TaskSheetDetails ON Maint_TaskSheets.TaskSheetId = Maint_TaskSheetDetails.TaskSheetId INNER JOIN 
         Maint_ItemTasks AS Maint_ItemTasks_5 ON Maint_TaskSheetDetails.TaskId = Maint_ItemTasks_5.TaskId INNER JOIN 
         Maint_Items ON Maint_TaskSheetDetails.ItemId = Maint_Items.ItemId INNER JOIN 
         All_CostCenter ON Maint_TaskSheets.CostCenterId = All_CostCenter.CostCenterID 
**WHERE  (@Date1 <= DATEADD(dd, 
          (SELECT  MaintenanceRate 
           FROM   Maint_ItemTasks AS Maint_ItemTasks_3 
           WHERE  (TaskId = Maint_TaskSheetDetails.TaskId)), Maint_TaskSheets.SheetMaintenanceDate)) AND (@Date2 >= DATEADD(dd, 
          (SELECT  MaintenanceRate 
           FROM   Maint_ItemTasks AS Maint_ItemTasks_2 
           WHERE  (TaskId = Maint_TaskSheetDetails.TaskId)), Maint_TaskSheets.SheetMaintenanceDate))** 
UNION ALL 
SELECT  Maint_ItemTaskDetails.TaskId, DATEADD(dd, 
          (SELECT  MaintenanceRate 
           FROM   Maint_ItemTasks AS Maint_ItemTasks_1 
           WHERE  (TaskId = Maint_ItemTaskDetails.TaskId)), Maint_ItemTaskDetails.MaintenanceStartingDate) AS Expr1, Maint_ItemTasks_4.TaskName, 
         Maint_Items_1.ItemName, All_CostCenter_1.CostCenterName 
FROM   Maint_ItemTaskDetails INNER JOIN 
         Maint_ItemTasks AS Maint_ItemTasks_4 ON Maint_ItemTaskDetails.TaskId = Maint_ItemTasks_4.TaskId INNER JOIN 
         Maint_Items AS Maint_Items_1 ON Maint_ItemTasks_4.ItemId = Maint_Items_1.ItemId INNER JOIN 
         All_CostCenter AS All_CostCenter_1 ON Maint_ItemTaskDetails.CostCenterId = All_CostCenter_1.CostCenterID 
**WHERE  (@Date1 <= DATEADD(dd, 
          (SELECT  MaintenanceRate 
           FROM   Maint_ItemTasks AS Maint_ItemTasks_1 
           WHERE  (TaskId = Maint_ItemTaskDetails.TaskId)), Maint_ItemTaskDetails.MaintenanceStartingDate)) AND (@Date2 >= DATEADD(dd, 
          (SELECT  MaintenanceRate 
           FROM   Maint_ItemTasks AS Maint_ItemTasks_1 
           WHERE  (TaskId = Maint_ItemTaskDetails.TaskId)), Maint_ItemTaskDetails.MaintenanceStartingDate))** AND (Maint_ItemTaskDetails.TaskId NOT IN 
          (SELECT  Maint_TaskSheetDetails_1.TaskId 
           FROM   Maint_TaskSheetDetails AS Maint_TaskSheetDetails_1 INNER JOIN 
                 Maint_TaskSheets AS Maint_TaskSheets_1 ON Maint_TaskSheetDetails_1.TaskSheetId = Maint_TaskSheets_1.TaskSheetId))

來源

2016-07-10 Rania Fathy

您的日期實際上是否存儲爲日期時間，並且是日期類型或日期時間的日期變量？ – scsimon

我懷疑你的date1和date2是VARCHAR – scsimon

是的，當我在我的代碼中使用填充函數....date1和date2作爲varchar（字符串）輸入 –

嘗試鑄造或轉換您的date1和date2像這樣。

CAST(@date1 as DATE)

您還可以使用CONVERT()作爲特定格式。

來源

2016-07-11 11:16:17 scsimon

Cast AS Date在sql server 2005中不起作用，我用DateTime代替，但不幸的是它給了我同樣的錯誤 –

有兩個問題。 maintenanceStartDate是一個datetime或varchar字段嗎？還有兩種，你輸入date1和date2的日期格式 – scsimon

很高興幫助！這是哪個？ – scsimon

DateAdd函數原因語法錯誤從字符串轉換datetime

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