Question

对于SELECT作业列表（包括sme特定详细类型的SUM（）），我需要一个SQL查询。

我有一个包含运输数据的数据库。表格看起来像这样：

job:
idjob | customer
1     | 45
2     | 38
3     | 15

job-detail:
iddet | idjob | type  | value
1     | 1     | range | 100
2     | 1     | range | 85
3     | 1     | range | 12
4     | 1     | price | 64
4     | 1     | price | 5
5     | 1     | note  | Some text here
6     | 2     | range | 150
7     | 2     | price | 32
8     | 2     | note  | Some text here
9     | 2     | range | 35

我需要以下输出：

idjob | customer | total_range | total_price
1     | 45       | 197         | 69
2     | 38       | 185         | 32
3     | 15       | 0           | 0

Answer 1

您可以将左联接与条件聚合一起使用

select a.idjob,customer,
       sum(case when type='range' then value end) as total_range,
       sum(case when type='price' then value end) as total_price
from job a 
left join job-detail b on a.idjob=b.idjob 
group by a.idjob,customer

Answer 2

SELECT DISTINCT J.idjob, J.customer, 
(SELECT SUM(CONVERT(INT, [VALUE])) FROM [dbo].[job-detail] WHERE TYPE = 'range' AND J.idjob = idjob) AS total_range,
(SELECT SUM(CONVERT(INT, [VALUE])) FROM [dbo].[job-detail] WHERE TYPE = 'price' AND J.idjob = idjob) AS total_price
 FROM [dbo].[job] j
LEFT JOIN [dbo].[job-detail] JD ON J.idjob = JD.idjob

从多个表中进行SELECT和SUM

2 个答案: