Question

我有一个与动态列的圆值有关的问题。

我是动态的（过去X天）创建一个每日分数的玩家列表，我想用这种格式ROUND(Score, 2)来舍入这些分数。这是我的疑问：

DECLARE @Column AS NVARCHAR(MAX),
        @SQL    AS NVARCHAR(MAX)

SELECT  [Player], [Start], [Average]
INTO #DbTemp1
FROM [PlayerScoreByWeek]
WHERE [Start] >= DateAdd(DAY, -7, GETDATE())

SELECT @Column = STUFF((SELECT ',' + QUOTENAME([Start])
                    FROM        #DbTemp1
                    GROUP BY    [Start]
                    ORDER BY    [Start] FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'),1,1,'')

SET @SQL = 'SELECT [Player],' + @Column + '
                INTO #DbTemp2
                FROM
                (
                    SELECT [Player], [Start], [Average]
                    FROM #DbTemp1
                ) AS SourceTable
                PIVOT
                (
                    AVG([Average])
                    FOR [Start] IN (' + @Column + ')
                ) AS PivotTable
                ORDER BY Len([Player]), Player
                SELECT * FROM #DbTemp2'
EXECUTE(@SQL)

当前输出如下：

Player    2014-02-24    2014-02-25    2014-02-26    2014-02-27    2014-02-28    2014-03-01    2014-03-02 
------    ----------    ----------    ----------    ----------    ----------    ----------    ----------
Carl       26.21654      55.1542       12.29612      29.16546       32.4556      21.1485        48.3652
Gene       46.13444      29.3298       16.31642      12.86592       65.6235      52.8525        31.5915
Kim        25.69554      39.5986       32.23184      34.55685       59.2125      12.2316        29.1242

这是理想的输出：

Player    2014-02-24    2014-02-25    2014-02-26    2014-02-27    2014-02-28    2014-03-01    2014-03-02 
------    ----------    ----------    ----------    ----------    ----------    ----------    ----------
Carl        26.22          55.15        12.30         29.17          32.46         21.14        48.37
Gene        46.13          29.33        16.32         12.87          65.62         52.85        31.59
Kim         25.70          39.60        32.23         34.56          59.21         12.23        29.12

鉴于列是动态创建的，因此无法在'@SQL'查询中使用round函数。谢谢你的帮助！

Answer 1

为您的输出创建另一个变量 - 例如：

DECLARE @Column AS NVARCHAR(MAX), @Output nvarchar(max), @SQL    AS NVARCHAR(MAX)

SELECT  [Player], [Start], [Average] INTO #DbTemp1 FROM [PlayerScoreByWeek] 
WHERE [Start] >= DateAdd(DAY, -7, GETDATE())

SELECT @Column = STUFF((SELECT ','+ QUOTENAME([Start])
                FROM        #DbTemp1
                GROUP BY    [Start]
                ORDER BY    [Start] FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'),1,1,''),
       @Output = STUFF((SELECT ', round('+ QUOTENAME([Start])+',2) as ' + QUOTENAME([Start])
                FROM        #DbTemp1
                GROUP BY    [Start]
                ORDER BY    [Start] FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'),1,1,'')


SET @SQL = 'SELECT [Player],' + @Output + '
            INTO #dbTemp2            
            FROM
            (
                SELECT [Player], [Start], [Average]
                FROM #DbTemp1
            ) AS SourceTable
            PIVOT
            (
                AVG([Average])
                FOR [Start] IN (' + @Column + ')
            ) AS PivotTable
            ORDER BY Len([Player]), Player;
            select * from #DbTemp2'
 EXECUTE(@SQL)

SQL Server：动态列的舍入值

1 个答案: