如何将查询结果分离为表示每个月的数据的列？

每个月我们都会制作小部件。我们构建红色，绿色和蓝色小部件。如何编写一个查询，计算每个颜色按月产生的小部件的数量？我希望结果是y轴标记为红色，绿色，蓝色和x轴的图表，标有1月，2月，3月等。如何将查询结果分离为表示每个月的数据的列？

年份号码无关紧要，我希望查询结果为看起来像下面。小部件的生产日期是可用数据的一部分（ex 04/02/2016）。我希望我可以使用datepart来拉动月份，但我希望它分组成列而不是行。请帮忙？

2016-05-13 bteague

您有PIVOT认识。 –

@NikolayFedorov谢谢你。枢轴是一个很好的线索。我发现这（http://stackoverflow.com/questions/15931607/convert-rows-to-columns-using-pivot-in-sql-server），但我仍然需要更多的指导..不知道该怎么做。 – bteague

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

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2016-05-13 19:44:58

如何将查询结果分离为表示每个月的数据的列？

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