获取动态查询选择字段以显示在水晶报表中

Question

我有一个我认为是相当复杂的查询（至少对我来说），因此我决定尝试使用动态SQL解决它。但是，我有两个无法解决的问题。

情况

在表中，用户可以输入具有金额，星期和状态的项目。 因此，数据应该类似于这种格式。

            Week 1        Week 2    
Status 1 |    50            25
Status 2      10            20

这是SQL中的数据。

Status 1  | Week 1 |25
Status 1  | Week 1 |25
Status 1  | Week 2 |25
Status 2  | Week 1 | 2
Status 2  | Week 1 | 8
Status 2  | Week 1 | 10
Status 2  | Week 1 | 10

对于每个状态，我都使用动态数据透视表以周为单位汇总金额。

我尝试了什么

--EXEC usp_weekReport @weeks=1, @year='2019'
ALTER PROC usp_weekReport
(
@weeks INT,
@year NVARCHAR(4)

)
AS
DECLARE @columns NVARCHAR(MAX), @sql NVARCHAR(MAX);
SET @columns = N'';
SELECT @columns += N', p.' + QUOTENAME([week])
  FROM (
  SELECT p.[week] 
  FROM [dbo].[Invoices] P
  WHERE DATEPART(YEAR,P.date)=@year
  AND 
  ([week] IN (@weeks)
  OR
  [week] IN (@weeks+1)
    OR
  [week] IN (@weeks+2)
    OR
  [week] IN (@weeks+3)
    OR
  [week] IN (@weeks+4)
    OR
  [week] IN (@weeks+5) 
  )
  GROUP BY P.[week] 

  ) AS x;
SET @sql = N'
SELECT p.[statusName],' + STUFF(@columns, 1, 2, '') + '
FROM
(
  SELECT 
    SUM(CAST(REPLACE(REPLACE(A.amount,'','',''''),''$'','''') AS FLOAT)) as sumInvoice,
  A.invoiceStatusID_FK,
  B.statusName,
  [week]
  FROM [dbo].[Invoices] A
  INNER JOIN invoiceStatus B
  ON A.invoiceStatusID_FK=B.invoiceStatusID
 GROUP BY invoiceStatusID_FK,B.statusName,[week]--,C.programme
) AS j
PIVOT
(
  SUM(sumInvoice) FOR [week] IN ('
  + STUFF(REPLACE(@columns, ', p.[', ',['), 1, 1, '')
  + ')
) AS p;';
--PRINT @sql;
--EXEC sp_executesql @sql;


CREATE TABLE #reportResult
(
statusName nvarchar(50),
weekA INT DEFAULT 0,
weekB int DEFAULT 0
--weekC int DEFAULT 0,
--weekD int DEFAULT 0,
--weekE int DEFAULT 0,
--weekF int DEFAULT 0
)
INSERT #reportResult Exec(@sql)
SELECT statusName, weekA,weekB--,weekC,weekD,weekE,weekF -- here you have "static SELECT with field names"
FROM #reportResult 
DROP TABLE #reportResult

为解决这个问题，我有上面的代码，当它工作时（返回SQL中的值），我有两个问题。

问题 我的第一个问题是，我不能将此代码与在Crystal报表中创建报表一起使用。当我导入存储过程时，这些列显示为空白。我看了下面的链接。 [从动态SQL查询中选择字段名称] [1]

[1]：SELECT fieldnames FROM dynamic SQL query，即使我尝试按照据说确实有效的方式为答案建模。它对我似乎不起作用，因为我的数据列在Crystal中仍然为空白。 我本来想从一个单独的存储过程中调用我的第一个存储过程，但是考虑到我的答案是如何返回的（不仅仅是我可以分配给变量的单个值，目前正在考虑返回一个表值函数）我对此表示怀疑会起作用。

出现的第二个问题是因为我的“周”是动态的（长达6周），因此无法创建带有“备用”列的临时表，或者出现错误（列数不正确），如您所见，他们出来，我也不能使用“选择进入”

感谢提供的任何帮助或想法。

Answer 1

尝试以下操作，它使用全局TEMP表：

ALTER PROCEDURE  usp_weekReport 
    @weeks INT,
    @year  NVARCHAR(4)
AS
BEGIN
    DECLARE @columns NVARCHAR(MAX), @sql NVARCHAR(MAX);

    SET @columns = N'';

    SELECT @columns+=N', p.'+QUOTENAME([week])
     FROM (
          SELECT p.[week]
          FROM [dbo].[Invoices] P
          WHERE DATEPART(YEAR, P.date) = @year
                AND ([week] IN(@weeks)
                OR [week] IN(@weeks + 1)
                OR [week] IN(@weeks + 2)
                OR [week] IN(@weeks + 3)
                OR [week] IN(@weeks + 4)
                OR [week] IN(@weeks + 5))
          GROUP BY P.[week]
       ) AS x;
     SET @sql = N'
                SELECT p.[statusName],'+STUFF(@columns, 1, 2, '')+'
                into ##reportResult
                FROM
                (
                  SELECT 
                    SUM(CAST(REPLACE(REPLACE(A.amount,'','',''''),''$'','''') AS FLOAT)) as sumInvoice,
                  A.invoiceStatusID_FK,
                  B.statusName,
                  [week]
                  FROM [dbo].[Invoices] A
                  INNER JOIN invoiceStatus B
                  ON A.invoiceStatusID_FK=B.invoiceStatusID
                 GROUP BY invoiceStatusID_FK,B.statusName,[week]--,C.programme
                ) AS j
                PIVOT
                (
                  SUM(sumInvoice) FOR [week] IN ('+STUFF(REPLACE(@columns, ', p.[', ',['), 1, 1, '')+')
                ) AS p;';
 EXEC sp_executesql @sql;
     SELECT *
     FROM ##reportResult;

     IF OBJECT_ID('tempdb..##reportResult') IS NOT NULL
     BEGIN
      DROP TABLE ##reportResult;
     END;
END

这是没有全局临时表的解决方案：

ALTER PROCEDURE  usp_weekReport 
    @weeks INT,
    @year  NVARCHAR(4)
AS
BEGIN
    DECLARE @columns NVARCHAR(MAX), @sql NVARCHAR(MAX), @COLCOUNT int, @TableColumns  NVARCHAR(MAX);

    SET @columns = N'';

    SELECT @columns+=N', p.'+QUOTENAME([week])
     FROM (
          SELECT p.[week]
          FROM [dbo].[Invoices] P
          WHERE DATEPART(YEAR, P.date) = @year
                AND ([week] IN(@weeks)
                OR [week] IN(@weeks + 1)
                OR [week] IN(@weeks + 2)
                OR [week] IN(@weeks + 3)
                OR [week] IN(@weeks + 4)
                OR [week] IN(@weeks + 5))
          GROUP BY P.[week]
       ) AS x;

    SELECT @COLCOUNT = count(*)
     FROM (
          SELECT p.[week]
          FROM [dbo].[Invoices] P
          WHERE DATEPART(YEAR, P.date) = @year
                AND ([week] IN(@weeks)
                OR [week] IN(@weeks + 1)
                OR [week] IN(@weeks + 2)
                OR [week] IN(@weeks + 3)
                OR [week] IN(@weeks + 4)
                OR [week] IN(@weeks + 5))
          GROUP BY P.[week]
       ) AS x;


      SELECT @TableColumns = CASE When @COLCOUNT = 1 THEN 'weekA'
                            When @COLCOUNT = 2 THEN 'weekA, weekB'
                            When @COLCOUNT = 3 THEN 'weekA, weekB, weekC'
                            When @COLCOUNT = 4 THEN 'weekA, weekB, weekC, weekD'
                            When @COLCOUNT = 5 THEN 'weekA, weekB, weekC, weekD, weekE'
                            When @COLCOUNT = 6 THEN 'weekA, weekB, weekC, weekD, weekE, weekF'                          
                        end;



      CREATE TABLE #reportResult
       (
          statusName nvarchar(50),
          weekA INT DEFAULT 0,
          weekB int DEFAULT 0,
          weekC int DEFAULT 0,
          weekD int DEFAULT 0,
          weekE int DEFAULT 0,
          weekF int DEFAULT 0
       )


     SET @sql = N'
             INSERT INTO #reportResult (statusName,' + @TableColumns +  ')
                SELECT p.[statusName],'+STUFF(@columns, 1, 2, '')+'
                into ##reportResult
                FROM
                (
                  SELECT 
                    SUM(CAST(REPLACE(REPLACE(A.amount,'','',''''),''$'','''') AS FLOAT)) as sumInvoice,
                  A.invoiceStatusID_FK,
                  B.statusName,
                  [week]
                  FROM [dbo].[Invoices] A
                  INNER JOIN invoiceStatus B
                  ON A.invoiceStatusID_FK=B.invoiceStatusID
                 GROUP BY invoiceStatusID_FK,B.statusName,[week]--,C.programme
                ) AS j
                PIVOT
                (
                  SUM(sumInvoice) FOR [week] IN ('+STUFF(REPLACE(@columns, ', p.[', ',['), 1, 1, '')+')
                ) AS p;';

    EXEC sp_executesql @sql;

     SELECT *
     FROM #reportResult;

     IF OBJECT_ID('tempdb..#reportResult') IS NOT NULL
     BEGIN
      DROP TABLE #reportResult;
     END;
END