SQL從科學概念轉換爲字符串

我試圖轉換浮動表的列，以便它們不會顯示爲科學記數法。我試過以下，但它似乎並沒有工作：SQL從科學概念轉換爲字符串

Update TABLE 
SET YTD = STR(YTD,12,2)

沒有任何影響，因爲我仍然可以在列的2.834566E + 07的值。

下面是完整的代碼：

declare @app_cur CURSOR 
declare @Current_PV_Value float 
declare @Current_Tagname varchar(100) 
DECLARE @Year INT; 
DECLARE @JanDate Datetime 
DECLARE @FebDate Datetime 
DECLARE @MarDate Datetime 
DECLARE @AprDate Datetime 
DECLARE @MayDate Datetime 
DECLARE @JunDate Datetime 
DECLARE @JulDate Datetime 
DECLARE @AugDate Datetime 
DECLARE @SepDate Datetime 
DECLARE @OctDate Datetime 
DECLARE @NovDate Datetime 
DECLARE @DecDate Datetime 
DECLARE @Date SMALLDATETIME; 
SET @Date = CONVERT(SMALLDATETIME, CONVERT(CHAR(4), @Year), 112); 


SET @Year = 2014; 


SET @JanDate = CAST(
       CAST(@Year+1 AS NVARCHAR(4)) + '02' + '01' + ' 00:05:00' 
       AS DATETIME) 
SET @FebDate = CAST(
       CAST(@Year+1 AS NVARCHAR(4)) + '03' + '01' + ' 00:05:00' 
       AS DATETIME) 
SET @MarDate = CAST(
       CAST(@Year+1 AS NVARCHAR(4)) + '04' + '01' + ' 00:05:00' 
       AS DATETIME) 
SET @AprDate = CAST(
       CAST(@Year AS NVARCHAR(4)) + '05' + '01' + ' 00:05:00' 
       AS DATETIME) 
SET @MayDate = CAST(
       CAST(@Year AS NVARCHAR(4)) + '06' + '01' + ' 00:05:00' 
       AS DATETIME) 
SET @JunDate = CAST(
       CAST(@Year AS NVARCHAR(4)) + '07' + '01' + ' 00:05:00' 
       AS DATETIME) 
SET @JulDate = CAST(
       CAST(@Year AS NVARCHAR(4)) + '08' + '01' + ' 00:05:00' 
       AS DATETIME) 
SET @AugDate = CAST(
       CAST(@Year AS NVARCHAR(4)) + '09' + '01' + ' 00:05:00' 
       AS DATETIME) 
SET @SepDate = CAST(
       CAST(@Year AS NVARCHAR(4)) + '10' + '01' + ' 00:05:00' 
       AS DATETIME) 
SET @OctDate = CAST(
       CAST(@Year AS NVARCHAR(4)) + '11' + '01' + ' 00:05:00' 
       AS DATETIME) 
SET @NovDate = CAST(
       CAST(@Year AS NVARCHAR(4)) + '12' + '01' + ' 00:05:00' 
       AS DATETIME) 
SET @DecDate = CAST(
       CAST(@Year+1 AS NVARCHAR(4)) + '01' + '01' + ' 00:05:00' 
       AS DATETIME) 
PRINT 'Opening cursor.' 
    SET @app_cur = CURSOR FORWARD_ONLY FOR 
    SELECT [Tagname2] 
    FROM  PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 


    -- Open cursor 1 for iteration. 
    OPEN @app_cur 

    -- Fetch the first record. 
    FETCH NEXT FROM @app_cur INTO @Current_Tagname 


    -- Iterate each record. 
    WHILE (@@FETCH_STATUS = 0) 
    BEGIN 
       --clear PV value 
       set @Current_PV_Value = null 
       --January Data 
       SELECT TOP 1 @Current_PV_Value = [Value] 
       FROM  [Runtime].[dbo].[History] 
       WHERE [TagName] = @Current_Tagname 
        AND wwRetrievalMode = 'Delta' 
        AND wwVersion = 'Latest' 
        AND [DateTime] >= @JanDate 
        AND [DateTime] <= dateadd(minute,5,@JanDate) 
       ORDER BY [DateTime] DESC 

       if @Current_PV_Value is not null 
       Begin 
         -- Update the return set with our phase number value. 
         UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Jan] = @Current_PV_Value 
         WHERE CURRENT OF @app_cur 
       end 
       if @Current_PV_Value is null 
       BEGIN 
        UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Jan] = 0 
         WHERE CURRENT OF @app_cur 
       END 
       --February Data 
       SELECT TOP 1 @Current_PV_Value = [Value] 
       FROM  [Runtime].[dbo].[History] 
       WHERE [TagName] = @Current_Tagname 
        AND wwRetrievalMode = 'Delta' 
        AND wwVersion = 'Latest' 
        AND [DateTime] >= @FebDate 
        AND [DateTime] <= dateadd(minute,5,@FebDate) 
       ORDER BY [DateTime] DESC 

       if @Current_PV_Value is not null 
       Begin 
         -- Update the return set with our phase number value. 
         UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Feb] = @Current_PV_Value 
         WHERE CURRENT OF @app_cur 
       end 
       if @Current_PV_Value is null 
       BEGIN 
        UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Feb] = 0 
         WHERE CURRENT OF @app_cur 
       END 
       Print 'tagname: '[email protected]_Tagname 
       Print 'value: '+ cast(@Current_PV_Value as varchar(50)) 
       --March Data 
       SELECT TOP 1 @Current_PV_Value = [Value] 
       FROM  [Runtime].[dbo].[History] 
       WHERE [TagName] = @Current_Tagname 
        AND wwRetrievalMode = 'delta' 
        AND wwVersion = 'Latest' 
        AND [DateTime] >= @MarDate 
        AND [DateTime] <= dateadd(minute,5,@MarDate) 
       ORDER BY [DateTime] DESC 

       if @Current_PV_Value is not null 
       Begin 
         -- Update the return set with our phase number value. 
         UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Mar] = @Current_PV_Value 
         WHERE CURRENT OF @app_cur 
       end 
       if @Current_PV_Value is null 
       BEGIN 
        UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Mar] = 0 
         WHERE CURRENT OF @app_cur 
       END 
       --April Data 
       SELECT TOP 1 @Current_PV_Value = [Value] 
       FROM  [Runtime].[dbo].[History] 
       WHERE [TagName] = @Current_Tagname 
        AND wwRetrievalMode = 'delta' 
        AND wwVersion = 'Latest' 
        AND [DateTime] >= @AprDate 
        AND [DateTime] <= dateadd(minute,5,@AprDate) 
       ORDER BY [DateTime] DESC 

       if @Current_PV_Value is not null 
       Begin 
         -- Update the return set with our phase number value. 
         UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Apr] = @Current_PV_Value 
         WHERE CURRENT OF @app_cur 
       end 
       if @Current_PV_Value is null 
       BEGIN 
        UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Apr] = 0 
         WHERE CURRENT OF @app_cur 
       END 
       --May Data 
       SELECT TOP 1 @Current_PV_Value = [Value] 
       FROM  [Runtime].[dbo].[History] 
       WHERE [TagName] = @Current_Tagname 
        AND wwRetrievalMode = 'Delta' 
        AND wwVersion = 'Latest' 
        AND [DateTime] >= @MayDate 
        AND [DateTime] <= dateadd(minute,5,@MayDate) 
       ORDER BY [DateTime] DESC 

       if @Current_PV_Value is not null 
       Begin 
         -- Update the return set with our phase number value. 
         UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [May] = @Current_PV_Value 
         WHERE CURRENT OF @app_cur 
       end 
       if @Current_PV_Value is null 
       BEGIN 
        UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [May] = 0 
         WHERE CURRENT OF @app_cur 
       END 
       --June Data 
       SELECT TOP 1 @Current_PV_Value = [Value] 
       FROM  [Runtime].[dbo].[History] 
       WHERE [TagName] = @Current_Tagname 
        AND wwRetrievalMode = 'Delta' 
        AND wwVersion = 'Latest' 
        AND [DateTime] >= @JunDate 
        AND [DateTime] <= dateadd(minute,5,@JunDate) 
       ORDER BY [DateTime] DESC 

       if @Current_PV_Value is not null 
       Begin 
         -- Update the return set with our phase number value. 
         UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Jun] = @Current_PV_Value 
         WHERE CURRENT OF @app_cur 
       end 
       if @Current_PV_Value is null 
       BEGIN 
        UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Jun] = 0 
         WHERE CURRENT OF @app_cur 
       END 
       --July Data 
       SELECT TOP 1 @Current_PV_Value = [Value] 
       FROM  [Runtime].[dbo].[History] 
       WHERE [TagName] = @Current_Tagname 
        AND wwRetrievalMode = 'Delta' 
        AND wwVersion = 'Latest' 
        AND [DateTime] >= @JulDate 
        AND [DateTime] <= dateadd(minute,5,@JulDate) 
       ORDER BY [DateTime] DESC 

       if @Current_PV_Value is not null 
       Begin 
         -- Update the return set with our phase number value. 
         UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Jul] = @Current_PV_Value 
         WHERE CURRENT OF @app_cur 
       end 
       if @Current_PV_Value is null 
       BEGIN 
        UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Jul] = 0 
         WHERE CURRENT OF @app_cur 
       END 
       --August Data 
       SELECT TOP 1 @Current_PV_Value = [Value] 
       FROM  [Runtime].[dbo].[History] 
       WHERE [TagName] = @Current_Tagname 
        AND wwRetrievalMode = 'Delta' 
        AND wwVersion = 'Latest' 
        AND [DateTime] >= @AugDate 
        AND [DateTime] <= dateadd(minute,5,@AugDate) 
       ORDER BY [DateTime] DESC 

       if @Current_PV_Value is not null 
       Begin 
         -- Update the return set with our phase number value. 
         UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Aug] = @Current_PV_Value 
         WHERE CURRENT OF @app_cur 
       end 
       if @Current_PV_Value is null 
       BEGIN 
        UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Aug] = 0 
         WHERE CURRENT OF @app_cur 
       END 
       --September Data 
       SELECT TOP 1 @Current_PV_Value = [Value] 
       FROM  [Runtime].[dbo].[History] 
       WHERE [TagName] = @Current_Tagname 
        AND wwRetrievalMode = 'Delta' 
        AND wwVersion = 'Latest' 
        AND [DateTime] >= @SepDate 
        AND [DateTime] <= dateadd(minute,5,@SepDate) 
       ORDER BY [DateTime] DESC 

       if @Current_PV_Value is not null 
       Begin 
         -- Update the return set with our phase number value. 
         UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Sep] = @Current_PV_Value 
         WHERE CURRENT OF @app_cur 
       end 
       if @Current_PV_Value is null 
       BEGIN 
        UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Sep] = 0 
         WHERE CURRENT OF @app_cur 
       END 
       if @Current_PV_Value is null 
       BEGIN 
        UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Sep] = 0 
         WHERE CURRENT OF @app_cur 
       END 
       --October Data 
       SELECT TOP 1 @Current_PV_Value = [Value] 
       FROM  [Runtime].[dbo].[History] 
       WHERE [TagName] = @Current_Tagname 
        AND wwRetrievalMode = 'Delta' 
        AND wwVersion = 'Latest' 
        AND [DateTime] >= @OctDate 
        AND [DateTime] <= dateadd(minute,5,@OctDate) 
       ORDER BY [DateTime] DESC 

       if @Current_PV_Value is not null 
       Begin 
         -- Update the return set with our phase number value. 
         UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Oct] = @Current_PV_Value 
         WHERE CURRENT OF @app_cur 
       end 
       if @Current_PV_Value is null 
       BEGIN 
        UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Oct] = 0 
         WHERE CURRENT OF @app_cur 
       END 
       --November Data 
       SELECT TOP 1 @Current_PV_Value = [Value] 
       FROM  [Runtime].[dbo].[History] 
       WHERE [TagName] = @Current_Tagname 
        AND wwRetrievalMode = 'Delta' 
        AND wwVersion = 'Latest' 
        AND [DateTime] >= @NovDate 
        AND [DateTime] <= dateadd(minute,5,@NovDate) 
       ORDER BY [DateTime] DESC 

       if @Current_PV_Value is not null 
       Begin 
         -- Update the return set with our phase number value. 
         UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Nov] = @Current_PV_Value 
         WHERE CURRENT OF @app_cur 
       end 
       if @Current_PV_Value is null 
       BEGIN 
        UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Nov] = 0 
         WHERE CURRENT OF @app_cur 
       END 
       --December Data 
       SELECT TOP 1 @Current_PV_Value = [Value] 
       FROM  [Runtime].[dbo].[History] 
       WHERE [TagName] = @Current_Tagname 
        AND wwRetrievalMode = 'Delta' 
        AND wwVersion = 'Latest' 
        AND [DateTime] >= @DecDate 
        AND [DateTime] <= dateadd(minute,5,@DecDate) 
       ORDER BY [DateTime] DESC 

       if @Current_PV_Value is not null 
       Begin 
         -- Update the return set with our phase number value. 
         UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Dec] = @Current_PV_Value 
         WHERE CURRENT OF @app_cur 
       end 
       if @Current_PV_Value is null 
       BEGIN 
        UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
         SET  [Dec] = 0 
         WHERE CURRENT OF @app_cur 
       END 
     FETCH NEXT FROM @app_cur INTO @Current_Tagname 
    END--End of cursor 1 logic 

    -- Close and dispose of the cursor. 
    CLOSE @app_cur 
    DEALLOCATE @app_cur 

--Year to Date Totals 
UPDATE PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 

    SET [YTD] = (ISNULL([Jan],0) + ISNULL([Feb],0)+ ISNULL([Mar],0) + ISNULL([Apr],0) + ISNULL([May],0) + ISNULL([Jun],0) + ISNULL([Jul],0) + ISNULL([Aug],0) + ISNULL([Sep],0) + ISNULL([Oct],0) + ISNULL([Nov],0) + ISNULL([Dec],0)) 

Update PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
SET Apr = round(apr,1), 
May = round(may,1), 
Jun = round(jun,1), 
Jul = round(jul,1), 
Aug = round(aug,1), 
Sep = round(sep,1), 
Oct = round(oct,1), 
Nov = round(nov,1), 
[Dec] = round(dec,1), 
Jan = round(jan,1), 
Feb = round(feb,1), 
Mar = round(mar,1), 
YTD = round(ytd,1) 

Update PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 
    SET YTD = str(cast(YTD as real)) 
Select str(cast(YTD as real)) from PARCS_DB.dbo.tbl_Utilities_PARCS_Totals 

select * from PARCS_DB.dbo.tbl_Utilities_PARCS_Totals

來源

2014-10-01 user3532047

從MSDN Developer Forums：

select str(cast(YTD as real)) from TABLE

如果從上面看右側的結果所以：

Update TABLE 
SET YTD = str(cast(YTD as real))

編輯：原來，你需要明確地告訴SQL，這是你真正想要做的：

BEGIN TRANSACTION UpdateScinot 

Update TABLE 
SET YTD = str(cast(YTD as real)) 

COMMIT TRANSACTION UpdateScinot 
GO

來源

2014-10-01 13:27:44 Undo

這似乎有與選擇語句正確的輸出。但是，當我做更新語句，然後從表中選擇*它仍然顯示原始？ – user3532047 2014-10-01 13:51:19

試試上面的查詢@ user3532047 – Undo 2014-10-01 13:54:03

試過了新的。在整個表格上進行選擇*時仍顯示原始值。 – user3532047 2014-10-01 13:58:31

SQL從科學概念轉換爲字符串

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