mysql - 如何将这两个查询组合成一个。？

Question

这些是我的两个查询当我分别触发它们时，我给出了正确的响应，但是当它们结合起来时，它们不会给出相同的响应。请帮助将它们结合起来

SELECT SUM(hours) AS S1
,operating_company
 FROM Hours WHERE operating_company='AP-OH' GROUP BY operating_company

SELECT COUNT(*) AS S1,event_type
,operating_company
 FROM Event WHERE operating_company='AP-OH' AND event_type='OSH Restricted' GROUP BY 
 operating_company,event_type

谢谢拉杰什B

Answer 1

尝试这个

  SELECT SUM(S1.hours) ,S1.operating_company ,S2.operating_company ,COUNT(S2.*),S2.event_type , S2.operating_company
   FROM Hours as S1 WHERE operating_company='AP-OH' 

   INNER JOIN event AS S2 
   ON    S2.operating_company = S1.operating_company
    WHERE S2.operating_company=S1.operating_company='AP-OH' AND S2.event_type='OSH Restricted'
   GROUP BY 
   S2.operating_company,S2.event_type

Answer 2

你可以这样做：

SELECT
  e.event_type,
  e.operating_company,
  SUM(h.hours) AS S1,
  COUNT(e.*) AS S2
FROM Hours h 
INNER JOIN event e ON h.operating_company = e.operating_company
WHERE h.operating_company = 'AP-OH' 
  AND e.event_type        = 'OSH Restricted' 
GROUP BY e.operating_company, e.event_type;