多加入SQL

Question

我有一個必須包含3個連接的查詢，但我得到這個錯誤：

Syntax error (Missing operator)

的SQL：

SELECT 
    Agents.[PF], 
    Agents.[User_ID], 
    Agents.[First_Name], 
    Agents.[Second_Name], 
    Agents.[Third_Name], 
    Agents.[Family_Name], 
    Agents.[Gender], 
    Agents.[Contract_Type], 
    Agents.Area, 
    Teams.Team_Name, 
    Agents.Hiring_Date, 
    Resignation_Pool.Resignation_Date, 
    Resignation_Pool.Effective_Date, 
    Replace(
      IIf(Skills.Skill_Directory IS NULL, '', 'Directory, ') 
     + IIf(Skills.Skill_TRC IS NULL, '', 'TRC, ') 
     + IIf(Skills.Skill_Prepaid IS NULL, '', 'Prepaid, ') 
     + IIf(Skills.Skill_Postpaid IS NULL, '', 'Postpaid, ') 
     + IIf(Skills.Skill_KeyAccount IS NULL, '', 'KeyAccount, ') 
     + IIf(Skills.Skill_Blackberry IS NULL, '', 'Blackberry, ') 
     + IIf(Skills.Skill_Broadband IS NULL, '', 'Broadband, ') 
     + IIf(Skills.Skill_Concierge IS NULL, '', 'Concierge, ') 
     + IIf(Skills.Skill_ISP IS NULL, '', 'ISP, ') 
     + IIf(Skills.Skill_Mada IS NULL, '', 'Mada, ') 
     + IIf(Skills.Skill_CSCS IS NULL, '', 'CSCS, ') 
     + '$', ', $', '' 
    ) AS Skills 
FROM Agents 
LEFT JOIN Resignation_Pool 
    ON Agents.PF = Resignation_Pool.PF 
LEFT JOIN Teams 
    ON Agents.Team = Teams.ID 
LEFT JOIN Skills 
    ON Agents.PF = Skills.PF 
WHERE Agents.Contract_Status = 'Active' 

是什麼原因造成這個錯誤？

Answer 1

MS Access需要在多個表格的JOIN語法附近使用括號。您將需要使用類似這樣：

FROM ((Agents 
LEFT JOIN Resignation_Pool 
    ON Agents.PF = Resignation_Pool.PF) 
LEFT JOIN Teams 
    ON Agents.Team = Teams.ID) 
LEFT JOIN Skills 
    ON Agents.PF = Skills.PF