Question

我无法搞清楚这一点。我检查了类似的帖子，但他们只有一列作为一行旋转。虽然我需要转动

我有以下查询：

SELECT  
      Year([Date]) as Year
      ,SUM([Drop]) as [Drop]
      ,SUM([TicketsDistributed]) as [TicketsDistributed]
      ,SUM([TicketsSold]) as [TicketsSold]
      ,SUM([GrossTickets]) as [GrossTickets]
      ,SUM([GrossTickets])/SUM(TicketsSold) as 'Per Cap'
  FROM [dbo].[Tickets]
  group by [Date]

这给了我这个结果：

Year    Drop    TicketsDistributed  TicketsSold GrossTickets    Per Cap
2016    222          100                 5000     4000.00       0.800000
2015    222          110                 5000     4000.00       0.900000
2014    222          120                 5000     4000.00       1.00000

我想要以下内容：

                       2016   2015   2014   
Drop                   222    222    222    
TicketsDistributed     100    110    120    
TicketsSold            5000   5000   5000     
GrossTickets           4000   4000   4000
Per Cap                0.8     0.9   1

根据建议的答案，这是我到目前为止所做的，但它不起作用

DECLARE @cols AS NVARCHAR(MAX),
    @query  AS NVARCHAR(MAX)

select @cols = STUFF((SELECT ',' + QUOTENAME(Year(Date)) 
                    from [dbo].[SpringTrainings] t
                    cross apply
                    (
                        select    SUM([Drop]) as [Drop]
      ,SUM([TicketsDistributed]) as [TicketsDistributed]
      ,SUM([TicketsSold]) as [TicketsSold]
      ,SUM([GrossTickets]) as [GrossTickets]
      ,SUM([GrossTickets])/SUM(TicketsSold) as PerCap
  FROM [dbo].[SpringTrainings]
                    ) c ([Drop],[TicketsDistributed],[TicketsSold],[GrossTickets],PerCap)
                    group by Year(Date)
                    order by Year(Date)
            FOR XML PATH(''), TYPE
            ).value('.', 'NVARCHAR(MAX)') 
        ,1,1,'')




set @query = 'SELECT [Drop],[TicketsDistributed],[TicketsSold],[GrossTickets],PerCap,' + @cols + ' 
            from 
            (
                select SUM([Drop]) as [Drop]
      ,SUM([TicketsDistributed]) as [TicketsDistributed]
      ,SUM([TicketsSold]) as [TicketsSold]
      ,SUM([GrossTickets]) as [GrossTickets]
      ,SUM([GrossTickets])/SUM(TicketsSold) as PerCap
        FROM [dbo].[SpringTrainings]

            ) x
            pivot 
            (
                max(Year([Date]))
                for Year([Date]) in (' + @cols + ')
            ) p '

execute sp_executesql @query;

Answer 1

如果您希望继续在T-SQL中使用pivot操作符，则首先需要“取消”现有查询，以便拥有Year，Label和Value。虽然在T-SQL中有一个univot操作员，我发现使用CROSS APPLY和VALUES要简单得多，同样快一些（对于Brad Schultz的方法read this article更多），我特别喜欢它，因为我可以想象通过布局值对的方式很容易得到结果。

SELECT
      d.Year
    , a.label
    , a.value
FROM (
      SELECT
            YEAR([Date]) AS [Year]
          , SUM([Drop]) AS [Drop]
          , SUM([TicketsDistributed]) AS [TicketsDistributed]
          , SUM([TicketsSold]) AS [TicketsSold]
          , SUM([GrossTickets]) AS [GrossTickets]
          , SUM([GrossTickets]) / SUM(TicketsSold) AS [PerCap]
      FROM [dbo].[Tickets]
      GROUP BY
            [Year]
      ) AS t
      CROSS APPLY ( /* now transform into 5 rows per year but just 1 value column */
          VALUES
                 ('Drop',t.Drop)
               , ('TicketsDistributed',t.TicketsDistributed)
               , ('TicketsSold',t.TicketsSold)
               , ('GrossTickets',t.GrossTickets)
               , ('PerCap',t.PerCap)
      ) AS a (label, value)

该查询（上面）替换了动态SQL中的派生表x。一旦数据被按摩到该形式，枢轴看起来就更简单了：

       ) x
        pivot 
        (
            max([x.Value])
            for [x.Year] in ([2014],[2015],[2016])
        ) p

对于你的@cols，我建议这样简单：

SELECT DISTINCT
    QUOTENAME(Year([date])) 
FROM [dbo].[Tickets]

提示：如果您需要一种订购行的方式，请在交叉申请中加入，如下所示：

      CROSS APPLY ( /* now transform into 5 rows per year but just 1 value column */
          VALUES
                 (1, 'Drop',t.Drop)
               , (2, 'TicketsDistributed',t.TicketsDistributed)
               , (3, 'TicketsSold',t.TicketsSold)
               , (4, 'GrossTickets',t.GrossTickets)
               , (5, 'PerCap',t.PerCap)
      ) AS a (row_order, label, value)

然后在执行透视后可以使用[row_order]。

所以总体看起来像这样：

DECLARE @cols AS nvarchar(max)
      , @query AS nvarchar(max)

SELECT @cols = STUFF((
            SELECT DISTINCT
                  ',' + QUOTENAME(YEAR([date]))
            FROM [dbo].[Tickets]
            FOR xml PATH (''), TYPE
      )
      .value('.', 'NVARCHAR(MAX)')
      , 1, 1, '')


SET @query = 'SELECT [Year], [Label], '
            + @cols 
            + ' FROM (
                  SELECT
                        d.Year
                      , a.label
                      , a.value
                  FROM (
                        SELECT
                              YEAR([Date]) AS [Year]
                            , SUM([Drop]) AS [Drop]
                            , SUM([TicketsDistributed]) AS [TicketsDistributed]
                            , SUM([TicketsSold]) AS [TicketsSold]
                            , SUM([GrossTickets]) AS [GrossTickets]
                            , SUM([GrossTickets]) / SUM(TicketsSold) AS [PerCap]
                        FROM [dbo].[Tickets]
                        GROUP BY
                              [Year]
                  ) AS d
                        CROSS APPLY (
                                  VALUES
                                         (1,''Drop'',t.Drop)
                                       , (2,''TicketsDistributed'',t.TicketsDistributed)
                                       , (3,''TicketsSold'',t.TicketsSold)
                                       , (4,''GrossTickets'',t.GrossTickets)
                                       , (5,''PerCap'',t.PerCap)
                        ) AS a (row_order,label,value)
                ) x
            pivot 
            (
                max([x.Value])
                for [x.Year] in (' + @cols + ')
            ) p
            ORDER BY [row_order]'

EXECUTE sp_executesql @query;

透视SQL表与动态年份列

1 个答案: