MySql中兩個表的交叉表

Question

我有兩個表，一個是* parts_raised *，另一個是* parts_detail *。

parts_raised：

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

Parts_detail：

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

兩個表中的part_code相同。

如何編寫查詢以獲取工作總數及其每天每位技術人員的總成本。

technician    day1                             day2            
              Total Jobs     total cost        Total Jobs     total cost   

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

如何實現這一目標或建議其他任何方法以獲得相同的結果？

Answer 1

這樣做嗎？

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