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我有以下查询，当我只是在 2012 年寻找数据时效果很好。现在我们在 2013 年，它变得有点混乱。我一直在尝试进行查询，它以如下所示的日期格式返回结果：2012 年 1 月，2012 年 2 月......然后还有 2013 年 1 月，2013 年 2 月。我将如何实现这一点？谢谢

SELECT 
    fp.name                                                  AS [Name],
    YEAR(fp.date)                                            AS [Year],
    SUM(CASE WHEN MONTH(fp.date) = '1'   THEN 1 ELSE 0 END)  AS [JAN],       
    SUM(CASE WHEN MONTH(fp.date) = '2'   THEN 1 ELSE 0 END)  AS [FEB],
    SUM(CASE WHEN MONTH(fp.date) = '3'   THEN 1 ELSE 0 END)  AS [MAR],
    SUM(CASE WHEN MONTH(fp.date) = '4'   THEN 1 ELSE 0 END)  AS [APR],
    SUM(CASE WHEN MONTH(fp.date) = '5'   THEN 1 ELSE 0 END)  AS [MAY],
    SUM(CASE WHEN MONTH(fp.date) = '6'   THEN 1 ELSE 0 END)  AS [JUN],
    SUM(CASE WHEN MONTH(fp.date) = '7'   THEN 1 ELSE 0 END)  AS [JUL],
    SUM(CASE WHEN MONTH(fp.date) = '8'   THEN 1 ELSE 0 END)  AS [AUG],
    SUM(CASE WHEN MONTH(fp.date) = '9'   THEN 1 ELSE 0 END)  AS [SEP],
    SUM(CASE WHEN MONTH(fp.date) = '10'  THEN 1 ELSE 0 END)  AS [OCT],
    SUM(CASE WHEN MONTH(fp.date) = '11'  THEN 1 ELSE 0 END)  AS [NOV],
    SUM(CASE WHEN MONTH(fp.date) = '12'  THEN 1 ELSE 0 END)  AS [DEC],
    COUNT(*)                                                 AS [Overall]

    FROM f_page_views fp


    WHERE fp.date > '2012-01-01 00:00:00.000'
    AND fp.date < '2013-12-31 00:00:00.000'

    GROUP BY 
    year(fp.date)
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1 回答 1

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你可以使用类似的东西：

SELECT  fp.Name,
        [Jan 2012] = SUM(CASE WHEN fp.Date >= '20120101' AND fp.Date < '20120201' THEN 1 ELSE 0 END),
        [Feb 2012] = SUM(CASE WHEN fp.Date >= '20120201' AND fp.Date < '20120301' THEN 1 ELSE 0 END),
        [Mar 2012] = SUM(CASE WHEN fp.Date >= '20120301' AND fp.Date < '20120401' THEN 1 ELSE 0 END),
        [Apr 2012] = SUM(CASE WHEN fp.Date >= '20120401' AND fp.Date < '20120501' THEN 1 ELSE 0 END),
        [May 2012] = SUM(CASE WHEN fp.Date >= '20120501' AND fp.Date < '20120601' THEN 1 ELSE 0 END),
        [Jun 2012] = SUM(CASE WHEN fp.Date >= '20120601' AND fp.Date < '20120701' THEN 1 ELSE 0 END),
        [Jul 2012] = SUM(CASE WHEN fp.Date >= '20120701' AND fp.Date < '20120801' THEN 1 ELSE 0 END),
        [Aug 2012] = SUM(CASE WHEN fp.Date >= '20120801' AND fp.Date < '20120901' THEN 1 ELSE 0 END),
        [Sep 2012] = SUM(CASE WHEN fp.Date >= '20120901' AND fp.Date < '20121001' THEN 1 ELSE 0 END),
        [Oct 2012] = SUM(CASE WHEN fp.Date >= '20121001' AND fp.Date < '20121101' THEN 1 ELSE 0 END),
        [Nov 2012] = SUM(CASE WHEN fp.Date >= '20121101' AND fp.Date < '20121201' THEN 1 ELSE 0 END),
        [Dec 2012] = SUM(CASE WHEN fp.Date >= '20121201' AND fp.Date < '20130101' THEN 1 ELSE 0 END),
        [Jan 2013] = SUM(CASE WHEN fp.Date >= '20130101' AND fp.Date < '20130201' THEN 1 ELSE 0 END),
        [Feb 2013] = SUM(CASE WHEN fp.Date >= '20130201' AND fp.Date < '20130301' THEN 1 ELSE 0 END),
        [Mar 2013] = SUM(CASE WHEN fp.Date >= '20130301' AND fp.Date < '20130401' THEN 1 ELSE 0 END),
        [Apr 2013] = SUM(CASE WHEN fp.Date >= '20130401' AND fp.Date < '20130501' THEN 1 ELSE 0 END),
        [May 2013] = SUM(CASE WHEN fp.Date >= '20130501' AND fp.Date < '20130601' THEN 1 ELSE 0 END),
        [Jun 2013] = SUM(CASE WHEN fp.Date >= '20130601' AND fp.Date < '20130701' THEN 1 ELSE 0 END),
        [Jul 2013] = SUM(CASE WHEN fp.Date >= '20130701' AND fp.Date < '20130801' THEN 1 ELSE 0 END),
        [Aug 2013] = SUM(CASE WHEN fp.Date >= '20130801' AND fp.Date < '20130901' THEN 1 ELSE 0 END),
        [Sep 2013] = SUM(CASE WHEN fp.Date >= '20130901' AND fp.Date < '20131001' THEN 1 ELSE 0 END),
        [Oct 2013] = SUM(CASE WHEN fp.Date >= '20131001' AND fp.Date < '20131101' THEN 1 ELSE 0 END),
        [Nov 2013] = SUM(CASE WHEN fp.Date >= '20131101' AND fp.Date < '20131201' THEN 1 ELSE 0 END),
        [Dec 2013] = SUM(CASE WHEN fp.Date >= '20131201' AND fp.Date < '20140101' THEN 1 ELSE 0 END)
FROM    f_page_views fp
WHERE   fp.date > '2012-01-01 00:00:00.000'
AND     fp.date < '2013-12-31 00:00:00.000'
GROUP BY fp.Name;

请注意，而不是使用WHEN MONTH(fp.Date) = 1 AND YEAR(fp.Date) = 2012I have used WHEN fp.Date >= '20120101' AND fp.Date < '20120201'，尽管这意味着后者会表现更好，特别是如果您有索引fp.Date

另一种方法是使用 PIVOT 函数：

WITH Data AS
(   SELECT  fp.Name,
            ViewMonth = DATEADD(MONTH, DATEDIFF(MONTH, 0, fp.Date), 0),
            Value = 1
    FROM    f_Page_Views
    WHERE   fp.date > '2012-01-01 00:00:00.000'
    AND     fp.date < '2013-12-31 00:00:00.000'
)
SELECT  *
FROM    Data
        PIVOT
        (   SUM(Value)
            FOR ViewMonth IN 
            (   [20120101], [20120201], [20120301], [20120401], [20120501], [20120601],
                [20120701], [20120801], [20120901], [20121001], [20121101], [20121201],
                [20130101], [20130201], [20130301], [20130401], [20130501], [20130601],
                [20130701], [20130801], [20130901], [20131001], [20131101], [20131201]
            ) pvt

如果您需要基于提供的日期范围动态创建的列，则可以将动态 SQL 与上述任一方法一起使用：

DECLARE @SQL NVARCHAR(MAX) = '';
DECLARE @StartDate DATETIME = '20120101',
        @EndDate DATETIME = '20131231';


SELECT  @SQL = @SQL + ',' + QUOTENAME(LEFT(DATENAME(MONTH, StartDate), 3) + ' ' + DATENAME(YEAR, StartDate)) + ' = SUM(CASE WHEN fp.Date >= ''' + CONVERT(VARCHAR, StartDate, 112) + ''' AND fp.Date < ''' + CONVERT(VARCHAR, EndDate, 112) + ''' THEN 1 ELSE 0 END)'
FROM    (   SELECT  [StartDate] = DATEADD(MONTH, Number, @StartDate),
                    [EndDate] = DATEADD(MONTH, 1 + Number, @StartDate)
            FROM    Master..spt_values
            WHERE   Number BETWEEN 0 AND DATEDIFF(MONTH, @StartDate, @Enddate)
            AND     Type = 'P'
        ) d

SET @SQL = 'SELECT  fp.Name' + @SQL + ' FROM f_page_views fp WHERE fp.date > @Start AND fp.Date < @End GROUP BY fp.Name';

EXECUTE SP_EXECUTESQL @SQL, N'@Start DATETIME, @End DATETIME', @StartDate, @EndDate;

或者

DECLARE @SQL NVARCHAR(MAX) = '';
DECLARE @StartDate DATETIME = '20120101',
        @EndDate DATETIME = '20131231';

SELECT  @SQL = @SQL + ',' + QUOTENAME(CONVERT(VARCHAR, DATEADD(MONTH, Number, @StartDate), 112))
FROM    Master..spt_values
WHERE   Number BETWEEN 0 AND DATEDIFF(MONTH, @StartDate, @Enddate)
AND     Type = 'P';

SET @SQL = 'WITH Data AS
            (   SELECT  fp.Name,
                        ViewMonth = DATEADD(MONTH, DATEDIFF(MONTH, 0, fp.Date), 0),
                        Value = 1
                FROM    f_Page_Views fp
                WHERE   fp.date > @Start
                AND     fp.date < @End
            )
            SELECT  *
            FROM    Data
                    PIVOT
                    (   SUM(Value)
                        FOR ViewMonth IN (' + STUFF(@SQL, 1, 1, '') + ')
                    ) pvt';

EXECUTE SP_EXECUTESQL @SQL, N'@Start DATETIME, @End DATETIME', @StartDate, @EndDate;
于 2013-03-11T12:30:16.083 回答