Question

遇到这个问题我想帮助我解决一些问题。我认为在程序代码中解决问题会更容易，但我开始重新思考这个问题。

使用PIVOT的SQL查询从SELECT语句中提取数据，其中一个字段[Cat_Entries]是用作单元格标签的硬编码值。 Cat_Entries的值是使用COUNT(EventGUID)和/或CAST(SUM(Duration) AS varchar(10)) AS TotalRepairTime计算得出的。

从下面的SELECT语句中，您可以看到三个查询中的UNION用于生成输出。但是，如果＆＃34;子查询＆＃34;作为计算结果，不返回任何值。但要求是显示标签[Cat_Entries]而不管其值如何。

以下是现在的数据：

Cat     Cat Entries           6/1/2012  7/1/2012  8/1/2012  9/1/2012
------  --------------------  --------  --------  --------  --------
00000A  Critical Down Time       1       
00000A  Critical Outage          1       
00000A  Total Repair Time        65         
00000B  Critical Down Time                                     6
00000B  Total Repair Time                                      90
00000C  Critical Down Time       1          5    
00000C  Critical Outage          1          5    
00000C  Total Repair Time        30         240    
00000D  Critical Down Time                                     2     
00000E  Critical Down Time                          1    
00000G  Critical Down Time                                     1    
00000M  Critical Down Time        1                            3    
00000M  Critical Outage           1                 3    
00000M  Total Repair Time         60                180

...这就是所需的输出应该是什么样的（**表示插入了空行）：

    Cat     Cat Entrie s          6/1/2012  7/1/2012  8/1/2012  9/1/2012
    ------  --------------------  --------  --------  --------  --------
    00000A  Critical Down Time       1       
    00000A  Critical Outage          1       
    00000A  Total Repair Time        65         
    00000B  Critical Down Time                                     6
**  00000B  Critical Outage          
    00000B  Total Repair Time                                      90
    00000C  Critical Down Time       1          5    
    00000C  Critical Outage          1          5    
    00000C  Total Repair Time        30         240 
    00000D  Critical Down Time                                     2   
**  00000D  Critical Outage          
**  00000D  Total Repair Time

以下是包含PIVOT：

的细分市场

SELECT @cols = STUFF(( SELECT DISTINCT TOP 100 PERCENT '],[' + cast([Year] as varchar(4))
FROM  vCatCountByMonthYear  where SiteGUID = @SiteGuid 
and [Year] BETWEEN @StartDate AND @StopDate ORDER BY '],[' + cast([Year] as varchar(4)) 
FOR XML PATH('') ), 1, 2, '') + ']' 

SET @query = N'SELECT Cat,[Cat_Entries], ' + @cols +' FROM (SELECT Cat,[Year],
[Cat_Entries],Value,OrderBy FROM vCatCountByMonthYear 
where SiteGUID = ' + CHAR(39) + CONVERT(nvarchar(36), @SiteGuid) + CHAR(39) + ' and 
[Year] BETWEEN ' + CHAR(39) + @StartDate + CHAR(39) + ' AND ' + CHAR(39) + 
@StopDate + CHAR(39) + ' ) p PIVOT ( Sum ([Value] ) FOR [Year] IN ( '+ @cols +' ) ) 
AS pvt ORDER BY Cat,OrderBy' 

execute(@query)

...这是sproc使用的VIEW：

SELECT SiteGUID, Cat_Entries, EntriesCount AS Value, 
       CONVERT(date, CAST(Month AS varchar(2)) + '-1-' + CAST(Year AS varchar(4))) AS MonthYear, 
       Month, Year, OrderBy, Cat, EventId
FROM (SELECT SiteGUID, 'Critical Down Time' AS Cat_Entries, COUNT(EventGUID) AS EntriesCount,
             Month, Year, 1 AS OrderBy, Cat, EventId
FROM dbo.vCatCountTotalEntries
GROUP BY SiteGUID, Month, Year, Cat, EventId

UNION
      SELECT SiteGUID, 'Critical Outage' AS Cat_Entries, COUNT(EventGUID) AS EntriesCount,
             Month, Year, 2 AS OrderBy, Cat, EventId
      FROM   dbo.vCatCountEqpEntries
      GROUP BY SiteGUID, Cat, Month, Year, Cat, EventId
UNION
      SELECT SiteGUID, 'Total Repair Time' AS Cat_Entries, 
             CAST(SUM(Duration) AS varchar(10)) AS TotalRepairTime, Month, Year, 3 AS OrderBy,
             Cat, EventId
      FROM   dbo.vCatCountOnEqpRprTm
      GROUP BY SiteGUID, Cat, Month, Year, Cat, EventId) AS W

一如既往，感谢您的时间和精力！ R上。

Answer 1

因此，为了获得额外的行，您的主要选择查询必须能够对其进行说明，这意味着您无法将其过滤掉。

您目前在startdate和stopdate之间执行[Year]，因此您的初始结果集只会包含您日期之间的值。不要限制它，让你的PIVOT为你做限制。

因此，您应该做的唯一改变就是将您的年份过滤器从主要选择中删除，我相信您应该看到您正在寻找的结果。

这是一个说明我的意思的例子：

    CREATE TABLE #years(year_name VARCHAR(20), year_actual int)
            --Insert three years
    INSERT INTO #years
            ( year_name, year_actual )
    SELECT 'rat', -- year_name - varchar(20)
              1924  -- year_actual - int
    UNION ALL
    SELECT 'ox',
              1925
    UNION ALL
    SELECT 'tiger',
              1926

            --I only care about two of those years
    SELECT year_name, [1924], [1925]
    FROM
            --I need to select all the years so that all three rows show
    (SELECT year_name, year_actual FROM #years) yr
    PIVOT
            --Here I select the years I actually care to count
    (COUNT(year_actual) FOR year_actual IN ([1924], [1925])) pvt

结果：

     --Now I pulled all three rows, with 'dragon' having zero rows
    ox  0   1
    rat 1   0
    tiger   0   0

在查询中插入固定值

1 个答案: