除了编写 SQL 查询语句以在同一行中显示单独的列值之外，还有其他方法吗？

Question

我正在导出一个SQL查询语句来准备一个统计报告。在在我的报告中，我需要在几个单独的列下显示值。这些 column 有不同的数值范围。 (I.e.1, 2-4, 5-10, 11-19, 20-49, TotalForEachCategory)。我如何制定我的 SQL 查询来执行相同的操作？目前，这些值位于不同的行中。

我正在准备 SSRS 报告。为此，我需要开发 SQL 声明。反映在报告中的列在 SQL table 中不是物理列。因此，我需要派生它们进行 SQL 聚合。举个例子，我需要为每个类别显示 "Total number of vehicle fleet carriers" 属于不同的舰队范围。

目前我的结果如下。（不正确）

                            Fleet Ranges
----------------------------------------------------------------------
|  1  |  2-4  |  5-10  | 11-19  |  20-49  | TotalForCategory
----------------------------------------------------------------------
| 70  |   0   |   0    |   0    |    0    |        70
| 0   |  38   |   0    |   0    |    0    |        38
| 0   |   1   |   0    |   0    |    0    |         1
| 0   |   0   |  27    |   0    |    0    |        27

到目前为止我尝试了什么

SQL查询：

SELECT
    (CASE WHEN F.mot_averagefleetsize = 1 THEN COUNT(M.mot_carriernumbername) ELSE 0 END) AS 'Fleet_Range_1',
    (CASE WHEN F.mot_averagefleetsize BETWEEN 2 AND 4 THEN COUNT(M.mot_carriernumbername) ELSE 0 END) AS 'Fleet_Range_2-4',
    (CASE WHEN F.mot_averagefleetsize BETWEEN 5 AND 10 THEN COUNT(M.mot_carriernumbername) ELSE 0 END) AS 'Fleet_Range_5-10',
    (CASE WHEN F.mot_averagefleetsize BETWEEN 11 AND 19 THEN COUNT(M.mot_carriernumbername) ELSE 0 END) AS 'Fleet_Range_11-19',
    (CASE WHEN F.mot_averagefleetsize BETWEEN 20 AND 49 THEN COUNT(M.mot_carriernumbername) ELSE 0 END) AS 'Fleet_Range_20-49'
FROM
    Table1 F
INNER JOIN 
    Table2 M ON M.column1 = F.column2
GROUP BY
    F.mot_averagefleetsize

我的预期结果应该如下所示：

                                  Fleet Ranges
----------------------------------------------------------------------
           |  1  |  2-4  |  5-10  | 11-19  |  20-49  | TotalForCategory
----------------------------------------------------------------------
Category #1| 70  |  39   |  27    |   0    |    0    |       136
           |

Answer 1

在派生 Table 聚合后使用 SUM。您需要指定类别字段

select 
categoryfield,
sum (Fleet_Range_1) Fleet_Range_1
sum (Fleet_Range_2-4) Fleet_Range_2-4
sum (Fleet_Range_5-10) Fleet_Range_5-10
sum (Fleet_Range_11-1) Fleet_Range_11-1
sum (Fleet_Range_20-49) Fleet_Range_20-49
from (
select
categoryfield
,(CASE WHEN F.mot_averagefleetsize = 1 THEN COUNT(M.mot_carriernumbername) ELSE 0 END) AS 'Fleet_Range_1'
,(CASE WHEN F.mot_averagefleetsize BETWEEN 2 AND 4 THEN COUNT(M.mot_carriernumbername) ELSE 0 END) AS 'Fleet_Range_2-4'
,(CASE WHEN F.mot_averagefleetsize BETWEEN 5 AND 10 THEN COUNT(M.mot_carriernumbername) ELSE 0 END) AS 'Fleet_Range_5-10'
,(CASE WHEN F.mot_averagefleetsize BETWEEN 11 AND 19 THEN COUNT(M.mot_carriernumbername) ELSE 0 END) AS 'Fleet_Range_11-19'
,(CASE WHEN F.mot_averagefleetsize BETWEEN 20 AND 49 THEN COUNT(M.mot_carriernumbername) ELSE 0 END) AS 'Fleet_Range_20-49'
from Table1 F
inner join Table2 M on M.column1 = F.column2
group by F.mot_averagefleetsize, categoryfield
) x
group by categoryfield

除了编写 SQL 查询语句以在同一行中显示单独的列值之外，还有其他方法吗？

Is there an alternative to writing SQL query statement to display separate column value in same row?

sql-server

group-by

subquery

common-table-expression