如何将查询结果分成表示每月数据的列？

Question

每个月我们都会使用小部件。我们构建红色，绿色和蓝色小部件。 如何编写一个查询，按月计算每种颜色生成的小部件数量？我希望结果是一个图表，y轴标记为红色，绿色，蓝色，x轴标记为Jan，Feb，Mar等。

年份数无关紧要，我希望查询结果如下所示。生成窗口小部件的日期是可用数据的一部分（ex 04/02/2016）。我希望我可以使用datepart拉月，但我希望它分组成列而不是行。请帮帮忙？

Answer 1

使用此代码：

IF OBJECT_ID('tempdb..#UsingColor','U') IS NOT NULL DROP TABLE #UsingColor;

CREATE TABLE #UsingColor
(color VARCHAR(10) NOT NULL
, usingDate DATE NOT NULL)


INSERT INTO #UsingColor(color, usingDate)
VALUES('red', '20160101')
, ('green', '20160101')
, ('blue', '20160201')
, ('red','20160201')
, ('red', '20160301')
, ('green', '20160301')
, ('blue', '20160301')
, ('orange','20160301')
, ('green', '20160401')
, ('green', '20160401')
, ('blue', '20160401')
, ('orange','20160401')
, ('blue', '20160401')
, ('green', '20160401')
, ('white', '20160401')
, ('orange','20160401')
, ('green', '20160501')
, ('white', '20160501')
, ('orange','20160601')
, ('white', '20160601')
, ('orange','20160601')
, ('green', '20160701')
, ('blue', '20160701')
, ('red','20160701')
, ('red', '20160801')
, ('green', '20160801')
, ('blue', '20160801')
, ('orange','20160801')
, ('green', '20160901')
, ('green', '20160901')
, ('blue', '20160901')
, ('orange','20160901')
, ('blue', '20160901')
, ('green', '20160901')
, ('white', '20160901')
, ('orange','20160901')
, ('green', '20161001')
, ('white', '20161001')
, ('orange','20161101')
, ('white', '20161101')
, ('orange','20161101')
--, ('black', '20161201')


SELECT color
    , [1] AS Jan
    , [2] AS Feb
    , [3] AS Mar
    , [4] AS Apr
    , [5] AS May
    , [6] AS Jun
    , [7] AS Jul
    , [8] AS Aug
    , [9] AS Sep
    , [10] AS Oct
    , [11] AS Nov
    , [12] AS Dec
FROM(
SELECT color, 1 AS cntr, MONTH(usingDate) AS m FROM #UsingColor) AS D
PIVOT(COUNT(cntr) FOR m IN([1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12])) AS P