mysql - MySql中两个表的交叉表

Question

我有两个表，一个是*parts_raised*，另一个是*parts_detail*。

parts_raised:

SN(int),Job_Number(int),Category(varchar),Part_code(int),technician(varchar),Time      (timestamp),

零件详情:

Part_code(int),Value(int),Descriptions(text),

两个表中的part_code相同。

我如何编写查询以实现工作总数以及每个技术人员每天的总成本。

technician    day1                             day2            
              Total Jobs     total cost        Total Jobs     total cost   

Technician-1  4                 153              5              253
Technician-2  7                 352              2              256

如何实现这一点或建议任何其他方法来获得相同的结果？

Answer 1

这样行吗？

SELECT
  technician, Job_day, SUM(Value)
FROM
(
  SELECT
    pr.technician, DAY(pr.Time) AS Job_day, pd.Value 
  FROM
    parts_raised AS pr
  JOIN
    Parts_detail AS pd
  ON
    pd.Part_code = pr.Part_code
) AS tempId
GROUP BY
  technician, Job_day