Sql server ms access/sql server语法（我猜）

此查询：

SELECT sentmails.[VersandDatum], 
       sentmails.[DatumMailGeplant], 
       mailintervals.[Interval], 
       definitions.[Subject], 
       users.[Name], 
       sentmails.[MailArt], 
       Objekte.[Name], 
       sentmails.[Erledigt], 
       sentmails.[ID]
  FROM Objekte 
RIGHT JOIN (users RIGHT JOIN (definitions RIGHT JOIN (mailintervals RIGHT JOIN (sentmails) ON mailintervals.ID=sentmails.Intervall) ON definitions.ID=sentmails.Noti_ID) ON users.UID=sentmails.Funktion) ON Objekte.OId=sentmails.Objekt_ID

…在ms access qbe中工作正常，但在sql server中，它会返回“不正确的语法（'）””错误。我真想知道为什么：

• 连接需要放在括号中吗
• sql server中不再有外部联接
• 需要更多的括号吗

---

您的

JOIN

语法不正确。您应该单独连接每个表，而不使用嵌套的括号。您可能需要以下内容：

SELECT sentmails.[VersandDatum]
    , sentmails.[DatumMailGeplant]
    , mailintervals.[Interval]
    , definitions.[Subject]
    , users.[Name]
    , sentmails.[MailArt]
    , Objekte.[Name]
    , sentmails.[Erledigt]
    , sentmails.[ID]
FROM Objekte
RIGHT JOIN sentmails ON Objekte.OId = sentmails.Objekt_ID
RIGHT JOIN users ON users.UID = sentmails.Funktion
RIGHT JOIN definitions ON definitions.ID = sentmails.Noti_ID
RIGHT JOIN mailintervals ON mailintervals.ID = sentmails.Intervall

---

.

MS Access的联接语法略有不同。改用这个：

SELECT 
    sentmails.[VersandDatum], 
    sentmails.[DatumMailGeplant], 
    mailintervals.[Interval], 
    definitions.[Subject], 
    users.[Name], 
    sentmails.[MailArt], 
    Objekte.[Name], 
    sentmails.[Erledigt], 
    sentmails.[ID]
FROM Objekte 
RIGHT JOIN sentmails ON Objekte.OId=sentmails.Objekt_ID
RIGHT JOIN definitions definitions.ID=sentmails.Noti_ID
RIGHT JOIN mailintervals ON mailintervals.ID=sentmails.Intervall
RIGHT JOIN users ON users.UID=sentmails.Funktion

只需尝试sqlstr.Replace（“右连接”、“右外部连接”）.Replace（（“，”）.Replace（“），”）似乎效果更好