将多行组合成一行SQL查询

Question

我有一个SQL表，其中包含我需要整理的数据。 我想要做的是组合B列中包含的ID为746的所有数据，以便在结果表中，列R2包含当列C非零时列E的总和，列R4包含列时列E的总和D不为零。 然后两个总和按F列中显示的百分比减少，列R3将是列C的总和，列R5是列D的总和。

来源数据

+----+------+-------------+------+------------+----+
| A  |  B   |      C      |  D   |     E      | F  |
+----+------+-------------+------+------------+----+
| 78 |  746 | 27          | 0    | 592.38     | 50 |
| 78 |  746 | 27          | 0    | 592.38     | 50 |
| 78 |  746 | 0           | 52.5 | 3178.36    | 50 |
| 78 |  746 | 484.25      | 0    | 10616.8450 |    |
| 78 |  827 | 875         | 0    | 19215      | 50 |
| 78 |  827 | 125         | 0    | 2745       | 50 |
| 78 | 1078 | 63.59999847 | 0    | 1272       | 50 |
+----+------+-------------+------+------------+----+

结果

+-----+---------+--------+---------+------+
| R1  |   R2    |   R3   |   R4    |  R5  |
+-----+---------+--------+---------+------+
| 746 | 5900.80 | 511.25 | 1589.18 | 52.5 |
+-----+---------+--------+---------+------+

This script should populate the initial data

create table #Test
(   
    A int,
    B int,
    C decimal(10,2),
    D decimal(10,2),
    E decimal(10,2),
    F int
)
insert into #Test select 78, 746, 27, 0, 0, 50
insert into #Test select 78, 746, 27, 0, 592.38, 50
insert into #Test select 78, 746, 0, 52.5, 3178.36, 50
insert into #Test select 78, 746, 484.25, 0, 10616.8450, 50
insert into #Test select 78, 827, 875, 0, 19215, 50
insert into #Test select 78, 827, 125, 0, 2745, 50
insert into #Test select 78, 1078,63.60, 0, 1272, 50

因为这不是我在SQL服务器上做了很多的事情，所以我感觉有点尴尬。 我认为我需要的区域是子查询，但我不确定任何帮助都会很棒。

谢谢

Answer 1

SELECT
  746 AS R1,
  SUM(c) AS R3,
  SUM(D) AS R5
FROM tablename
WHERE B = 746;

• 演示

Answer 2

好吧，这似乎是你想要的：

SELECT  B AS R1,
        SUM(CASE WHEN C != 0 THEN E END)*MIN(F)/100 AS R2,
        SUM(C) AS R3,
        SUM(CASE WHEN D != 0 THEN E END)*MIN(F)/100 AS R4,
        SUM(D) AS R5
FROM #test
WHERE B = 746
GROUP BY B

结果：

╔═════╦═════════════╦════════╦═════════════╦═══════╗
║ R1  ║     R2      ║   R3   ║     R4      ║  R5   ║
╠═════╬═════════════╬════════╬═════════════╬═══════╣
║ 746 ║ 5900.805000 ║ 538.25 ║ 1589.180000 ║ 52.50 ║
╚═════╩═════════════╩════════╩═════════════╩═══════╝

列R3的结果差异是因为您没有考虑其中一行。

Answer 3

您是否只想总结独特/不同的价值观？

如果是这样的话，

select 
    B as R1, 
    sum(distinct C) as R3,
    sum(distinct D) as R5
from #Test
group by B
where B = 746

Answer 4

0 - 我注意到insert语句中有一个错误，第一行，E列应该是592.38而不是0。

insert into #Test select 78, 746, 27, 0, 0, 50;

下面有几点需要注意。

1 - 表确实允许空值。 因此，您应该使用COALESCE （）来处理该情况或显式地将其声明为NOT NULL 。

2 - 为什么每行重复百分比？

IE - 如果每个具有键B（R1）= 746的行具有50的百分比，则表不是3RD正常形式 。您可以创建另一个表，其中列B作为键，列F作为百分比。

我更改了下面的代码来处理不同行具有不同百分比的情况。

除了那些评论，Lamak代码将起作用。

Ĵ

-- Drop the test table
drop table #my_test
go

-- Create the test table
create table #my_test
(   
    A int,
    B int,
    C decimal(10,2),
    D decimal(10,2),
    E decimal(10,2),
    F int
);
go

-- Add the data
insert into #my_test select 78, 746, 27, 0, 592.38, 50;
insert into #my_test select 78, 746, 27, 0, 592.38, 50;
insert into #my_test select 78, 746, 0, 52.5, 3178.36, 50;
insert into #my_test select 78, 746, 484.25, 0, 10616.8450, 50;
insert into #my_test select 78, 827, 875, 0, 19215, 50;
insert into #my_test select 78, 827, 125, 0, 2745, 50;
insert into #my_test select 78, 1078,63.60, 0, 1272, 50;
go

-- Show the data
select * from #my_test;
go

-- Create the report
SELECT  B AS R1,
        SUM(CASE 
            WHEN COALESCE(C, 0) != 0 THEN E * F / 100 END) AS R2,
        SUM(C) AS R3,
        SUM(CASE 
            WHEN COALESCE(D, 0) != 0 THEN E * F / 100 END) AS R4,
        SUM(D) AS R5
FROM #my_test
WHERE B = 746
GROUP BY B