我有服務,它有多個任務。每個任務都有一個特定向量的扣除。總計由多列
我希望通過每個Vector_id和每個服務查詢所有矢量扣除%。
例如,我想:
Service | Vector | Deduction %
---------------------------------------
SM | 10 | 5
SM | 11 | 10
....
ES | 10 | 5
....
我已經得到命令我希望通過總結釦除列,但不能按語句獲取正確的組:
Select
Service.name AS ServiceName,
Task.name AS TaskName,
Deduction.Vector_id AS DeductionVector,
Deduction.deduction AS DeductionPercentage
FROM
Task JOIN Service ON
Service.id = Task.Service_id
JOIN Deduction ON
Deduction.Task_id = Task.id
ORDER BY ServiceName, DeductionVector;
下面是各表正在使用和一些數據:http://www.sqlfiddle.com/#!9/ea5f70
我可以幫你嗎? – rbr94
有點奇怪,短語'SUM'和'GROUP BY'都從你的查詢中缺失 – Strawberry
如果對這裏的評論和回答有任何反應,這將是很好的 – rbr94