左联接，两个表不起作用

Question

我正在尝试在MS ACCESS2010查询中加入两个两个表，但它给出了错误，这是查询

SELECT f.FileName, f.CreationDate, fs.SheetName, fs.SheetNo, SB.Tags
 FROM Files AS  f  LEFT JOIN FilesSheets AS  fs
ON f.FileId = fs.FileId
LEFT JOIN SubmitSheets AS  SB 
ON  f.FileId =SB.FileId
WHERE f.FileId = 'Machine_Inspection_20140820183554.xlsx'

这是错误

Answer 1

联接周围需要访问括号将它们分组。 尝试这个：

SELECT f.FileName, f.CreationDate, fs.SheetName, fs.SheetNo, SB.Tags
FROM (Files f 
LEFT JOIN FilesSheets fs
ON f.FileId = fs.FileId)
LEFT JOIN SubmitSheets SB 
ON  f.FileId = SB.FileId
WHERE f.FileId = 'Machine_Inspection_20140820183554.xlsx'