Question

我有这个查询在SQL服务器中工作正常，但在Access中没有，我在转换它时遇到问题。我一直听说JET缺少某些TSQL功能，我认为复杂的连接就是其中之一。

SELECT C.[Position], TT.[Description] as TrainingType, T.ProgramTitle, T.ProgramSubTitle, T.ProgramCode, ET.CompletedDate
from HR_Curriculum C
LEFT JOIN HR_Trainings T ON C.TrainingID = T.TrainingID
LEFT JOIN HR_TrainingTypes TT ON T.TrainingTypeID = TT.TrainingTypeID

LEFT JOIN HR_EmployeeTrainings ET ON C.TrainingID = ET.TrainingID
                                 AND (ET.AvantiRecID IS NULL OR ET.AvantiRecID = '637')
where ( c.[Position] = 'Customer Service Representative'
      OR C.[Position] = 'All Employees')
order by [Position], Description, ProgramTitle

我尝试在WHERE子句中放下额外的连接子句，但由于某种原因，这不会产生正确的记录数。

Answer 1

如果JOIN中有多个ms-access，则需要用括号括起来：

SELECT C.[Position], TT.[Description] as TrainingType, T.ProgramTitle, T.ProgramSubTitle, T.ProgramCode, ET.CompletedDate
from (((HR_Curriculum C
LEFT JOIN HR_Trainings T ON C.TrainingID = T.TrainingID)
LEFT JOIN HR_TrainingTypes TT ON T.TrainingTypeID = TT.TrainingTypeID)

LEFT JOIN HR_EmployeeTrainings ET ON C.TrainingID = ET.TrainingID
                                 AND (ET.AvantiRecID IS NULL OR ET.AvantiRecID = '637'))
where ( c.[Position] = 'Customer Service Representative'
      OR C.[Position] = 'All Employees')
order by [Position], Description, ProgramTitle

或者您将遇到Missing Operator错误

Answer 2

检查您的表别名是否以'as'表示。 Access不喜欢[tablename] [alias]，而是将[tablename]作为[alias]。我知道复杂的左连接不应该是一个问题，但如果它返回一些连接错误，Access可能会阻塞别名延迟。我也会尝试查询ET表上的限制，然后将其加入到更大的查询中。我注意到，尝试对左或右连接中涉及的记录设置限制通常不会产生正确的记录，因为Access将在连接后限制集合。

无法将SQL查询转换为Access

2 个答案: