无法找出Access SQL语法错误

我试图用MicrosoftAccessSQL编写这个查询，我一生都无法找出代码中的语法错误

SELECT base.study_group, base.NPI,inv.log_date AS invite_date, rec.log_date as
recieved_date, rej.log_date as reject_date
FROM CODAAC_master AS base
LEFT JOIN Pre_Log AS inv ON base.NPI = inv.NPI AND inv.tracking_event='INVA'
LEFT JOIN Pre_Log AS rec ON base.NPI = rec.NPI AND rec.tracking_event='RECA'
LEFT JOIN Pre_Log AS rej ON base.NPI = rej.NPI AND rej.tracking_event='REJA'
WHERE base.study_year = '2013'
ORDER BY base.study_group, base.NPI;

我得到的错误是：

"Syntax error (missing operator) in query expression"

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MS Access要求在多个联接周围加括号：

SELECT base.study_group, 
  base.NPI,
  inv.log_date AS invite_date, 
  rec.log_date as recieved_date, 
  rej.log_date as reject_date
FROM ((CODAAC_master AS base
LEFT JOIN Pre_Log AS inv 
  ON base.NPI = inv.NPI AND inv.tracking_event='INVA')
LEFT JOIN Pre_Log AS rec 
  ON base.NPI = rec.NPI AND rec.tracking_event='RECA')
LEFT JOIN Pre_Log AS rej 
  ON base.NPI = rej.NPI AND rej.tracking_event='REJA'
WHERE base.study_year = '2013'
ORDER BY base.study_group, base.NPI;

---

您需要在连接之间添加括号，因为这在MS Access中是必不可少的。（这在其他RDBMS上是可选的）

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使用查询设计窗口。你缺少括号。Access需要他们加入。感谢您的帮助。我添加了括号，但现在它表示不支持联接表达式。您使用的ms access版本是什么/您的问题是关于这一点的，请尝试执行更新的语句

SELECT  base.study_group, 
        base.NPI,
        inv.log_date AS invite_date, 
        rec.log_date as recieved_date, 
        rej.log_date as reject_date
FROM  ((CODAAC_master AS base LEFT JOIN Pre_Log AS inv 
            ON base.NPI = inv.NPI AND inv.tracking_event='INVA')
        LEFT JOIN Pre_Log AS rec 
            ON base.NPI = rec.NPI AND rec.tracking_event='RECA')
        LEFT JOIN Pre_Log AS rej 
            ON base.NPI = rej.NPI AND rej.tracking_event='REJA'
WHERE base.study_year = '2013'
ORDER BY base.study_group, base.NPI;