3個訪問表上的外連接

Question

我對此代碼有語法錯誤。有沒有可能得到你的幫助。我幾天後就開始工作，我可以解決我的問題。

這裏是代碼：

SELECT Area.org, Supervisors.NomSup, Supervisors.PrenomSup, Employees.NomEmp, 
    Employees.PrenomEmp, Employees.NoIdAlcanEmp, Competencies.CodeCompetencies, Competencies.CompetencyName, 
    LinkResultComp.AssNote, LinkResultComp.AssDate 
    FROM ((((((Area 
    INNER JOIN Supervisors ON Area.IdArea = Supervisors.IdArea) 
    INNER JOIN Employees ON Supervisors.IdSupervisor = Employees.IdSupervisor) 
    INNER JOIN LinkProfilesEmployees ON Employees.IdEmp = LinkProfilesEmployees.IdEmp) 
    INNER JOIN Profiles ON Profiles.IdProfiles = LinkProfilesEmployees.IdProfiles) 
    INNER JOIN LinkProfComp ON Profiles.IdProfiles = LinkProfComp.IdProfiles) 
    INNER JOIN Competencies ON Competencies.IdCompetencies = LinkProfComp.IdCompetencies) 
    LEFT OUTER JOIN LinkResultComp ON (Competencies.IdCompetencies = LinkResultComp.IdCompetencies)) 
    WHERE Area.org LIKE "*20*" AND Competencies.CodeCompetencies LIKE "khse2010-05" 
    ORDER BY Supervisors.NomSup, Employees.NomEmp; 

Answer 1

對我來說，它看起來像有一個最後的不必要的額外) - 試試這個：

SELECT Area.org, 
     Supervisors.NomSup, 
     Supervisors.PrenomSup, 
     Employees.NomEmp, 
     Employees.PrenomEmp, 
     Employees.NoIdAlcanEmp, 
     Competencies.CodeCompetencies, 
     Competencies.CompetencyName, 
     LinkResultComp.AssNote, 
     LinkResultComp.AssDate 
FROM ((((((
      Area INNER JOIN Supervisors ON Area.IdArea = Supervisors.IdArea 
     ) 
      INNER JOIN Employees ON Supervisors.IdSupervisor = Employees.IdSupervisor 
     ) 
     INNER JOIN LinkProfilesEmployees ON Employees.IdEmp = LinkProfilesEmployees.IdEmp 
     ) 
     INNER JOIN Profiles ON Profiles.IdProfiles = LinkProfilesEmployees.IdProfiles 
     ) 
     INNER JOIN LinkProfComp ON Profiles.IdProfiles = LinkProfComp.IdProfiles 
    ) 
     INNER JOIN Competencies ON Competencies.IdCompetencies = LinkProfComp.IdCompetencies 
    ) 
    LEFT OUTER JOIN LinkResultComp ON (Competencies.IdCompetencies = LinkResultComp.IdCompetencies) 
WHERE Area.org LIKE '*20*' AND Competencies.CodeCompetencies LIKE 'khse2010-05' 
ORDER BY Supervisors.NomSup, Employees.NomEmp;