获取要在 Crystal Reports 中显示的动态查询选择字段

Question

我有一个我认为非常复杂的查询（至少对我而言），我决定尝试使用动态 SQL 来解决它。但是，我有两个我无法解决的问题。

情况

在表格中，用户可以输入具有金额、周数和状态的项目。

所以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，我使用动态数据透视表根据周数求和。

我尝试了什么：

--EXEC usp_weekReport @weeks=1, @year='2019'
ALTER PROCEDURE 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

为了解决这个问题，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 Reports 中创建报表结合使用。当我导入存储过程时，这些列显示为空白。我查看了以下链接。 [从动态 SQL 查询中选择字段名称][1]

[1]：SELECT fieldnames FROM dynamic SQL query，即使我试图按照所说的完全有效的方法来模拟我的答案。它似乎对我不起作用，因为我的数据列在 Crystal 中仍然是空白的。

我有从一个单独的存储过程调用我的第一个存储过程的想法，但给出了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）我怀疑这是否可行。

出现的第二个问题是因为我的“周”是动态的（最多 6 周）我无法创建带有“备用”列的临时表，或者我收到错误（列数不正确），正如你所看到的我评论他们出去，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，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

这是一个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