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Question

我有一个视图，目前拉数百万条记录，我想过滤它到一个单一的，特定的帐户号码。我目前已决定使用帐号过滤器（为便于使用）创建新的自定义视图。

这是我如何做它：

SELECT * FROM VIEW_NAME WHERE [帐号] = '1000'

这给了我正是我的预期。不过，我想创建一个名为VIEW_NAME_1000的全新视图，并进行其他修改，我希望根据已存在的日期字段创建一个月份列。

我已经试过这样：

CASE 
    WHEN(MONTH(T1.[TRX Date]) = 1) THEN "January " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
    WHEN(MONTH(T1.[TRX Date]) = 2) THEN "February " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
    WHEN(MONTH(T1.[TRX Date]) = 3) THEN "March " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
    WHEN(MONTH(T1.[TRX Date]) = 4) THEN "April " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
    WHEN(MONTH(T1.[TRX Date]) = 5) THEN "May " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
    WHEN(MONTH(T1.[TRX Date]) = 6) THEN "June " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
    WHEN(MONTH(T1.[TRX Date]) = 7) THEN "July " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
    WHEN(MONTH(T1.[TRX Date]) = 8) THEN "August " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
    WHEN(MONTH(T1.[TRX Date]) = 9) THEN "September " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
    WHEN(MONTH(T1.[TRX Date]) = 10) THEN "October " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
    WHEN(MONTH(T1.[TRX Date]) = 11) THEN "November " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
    WHEN(MONTH(T1.[TRX Date]) = 12) THEN "December " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
END as 'Trx Month' 

我不知道是不是我所需要的T1。参考，特别是因为我只从我现有的视图中提取数据。

这是我的整个SQL查询，但它不能按预期工作......无论我在何处放置我的情况，我都会收到错误消息。

CREATE VIEW [dbo].[VIEW_NAME_1000] AS 

SELECT  [Journal Entry], Series, [TRX Date], [Account Number], [Account Description], [Credit Amount], [Debit Amount], [Account Category Number], 
         [Account Description from Account Master], [Account Index], [Account Type], [Account Type from Account Master], Active, [Adjust for Inflation], [Back Out JE], 
         [Balance For Calculation], [Balance For Calculation from Account Master], [Batch Number], [Batch Source], [Closed Year], [Conversion Method], [Correcting JE], 
         CorrespondingUnit, [Created Date], [Currency ID], [Currency Index], [DTA Control Number], [DTA GL Status], [DTA Index], [DTA TRX Type], [Decimal Places], 
         [Decimal Places from Account Master], [Denomination Exchange Rate], Description, [Document Date], [Document Status], [Error State], [Exchange Date], 
         [Exchange Rate], [Exchange Table ID], [Fixed Or Variable], [Fixed Or Variable from Account Master], [Historical Rate], [History TRX], [History Year], ICDists, [IC TRX], 
         [Inflation Equity Account Index], [Inflation Revenue Account Index], [Intercompany ID], [Last Date Edited], [Last User], [Line Status], [MC Transaction State], 
         [Main Account Segment], [Modified Date], [Note Index], [Note Index from Account Master], [Open Year], [Original JE], [Originating Company ID], 
         [Originating Control Number], [Originating Credit Amount], [Originating DTA Series], [Originating Debit Amount], [Originating Document Number], 
         [Originating Journal Entry], [Originating Master ID], [Originating Master Name], [Originating Posted Date], [Originating Sequence Number], [Originating Source], 
         [Originating TRX Source], [Originating TRX Type], [Originating Type], [Period ID], [Period Posting Number], [Approval User ID], [Approval Date], [Polled Transaction], 
         [Post Inventory In], [Post Payroll In], [Post Purchasing In], [Post Sales In], [Posting Number], [Posting Type], [Posting Type from Account Master], [Printing Status], 
         [Quick Offset], [Rate Calculation Method], [Rate Type ID], [Recurring TRX], [Recurring TRX Sequence], Reference, [Reversing Closed Year], [Reversing Date], 
         [Reversing History TRX], [Reversing Period ID], [Reversing TRX Source], [Reversing Year], Segment1, Segment2, Segment3, [Sequence Number], [Source Document], 
         [TRX Source], [Tax Date], Time, [Transaction Type], [Typical Balance], [User Defined 1], [User Defined 2], [User Who Posted], Voided, Segments, 
         [Workflow Approval Status], [Workflow Priority], [Ledger Name], [Ledger Description], [Account Index For Drillback], [Journal Entry For Drillback]  
FROM   dbo.AccountTransactions 
WHERE ([Account Number] = '1000-000-00') 

    CASE 
     WHEN(MONTH(T1.[TRX Date]) = 1) THEN "January " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
     WHEN(MONTH(T1.[TRX Date]) = 2) THEN "February " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
     WHEN(MONTH(T1.[TRX Date]) = 3) THEN "March " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
     WHEN(MONTH(T1.[TRX Date]) = 4) THEN "April " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
     WHEN(MONTH(T1.[TRX Date]) = 5) THEN "May " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
     WHEN(MONTH(T1.[TRX Date]) = 6) THEN "June " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
     WHEN(MONTH(T1.[TRX Date]) = 7) THEN "July " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
     WHEN(MONTH(T1.[TRX Date]) = 8) THEN "August " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
     WHEN(MONTH(T1.[TRX Date]) = 9) THEN "September " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
     WHEN(MONTH(T1.[TRX Date]) = 10) THEN "October " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
     WHEN(MONTH(T1.[TRX Date]) = 11) THEN "November " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
     WHEN(MONTH(T1.[TRX Date]) = 12) THEN "December " + CONVERT(VARCHAR(4), YEAR(T1.[TRX Date])) 
    END as 'Trx Month' 

GO 

我错过了哪些步骤？我一直在绞尽脑汁，不知如何着手。

Answer 1

可以大大简化代码：

CREATE VIEW [dbo].[VIEW_NAME_1000] AS 
    SELECT . . ., 
      DATENAME(MONTH, t.[TRX Date]) + ' ' + DATENAME(YEAR, t.[TRX Date]) 
    FROM dbo.AccountTransactions t 
    WHERE [Account Number] = '1000-000-00'; 

你并不需要一个巨大的case表达式生成月份名称。