TSQL刪除使用內部聯接

Question

下面的SQL語句執行罰款，我的數據庫：

SELECT * FROM tblKPIs AS k 
INNER JOIN tblKeyPointLinks AS l ON k.KPIID = l.KPIID 
INNER JOIN tblKeyPoints AS p ON p.KptID = l.KptID 
INNER JOIN tblHistory AS h ON h.HistoryID = p.HistoryID 
WHERE h.CaseNo = 50043; 

然而，相當於delete語句提供了一個錯誤「語法附近AS」？

DELETE FROM tblKPIs AS k 
INNER JOIN tblKeyPointLinks AS l ON k.KPIID = l.KPIID 
INNER JOIN tblKeyPoints AS p ON p.KptID = l.KptID 
INNER JOIN tblHistory AS h ON h.HistoryID = p.HistoryID 
WHERE h.CaseNo = 50043; 

我不能在Delete語句中使用連接嗎？

如果不是我如何執行上面的Delete？

EDIT

表tblKeyPointLinks爲中間表建立tblKPIs和tblKeyPoints之間的多對多的關係。因此SELECT語句不止一次返回tblKPIs中的一些條目。這就是爲什麼DELETE語句可能有問題嗎？解決此問題的最佳方法是什麼？

Answer 1

是的，你可以在delete語句JOIN：

DELETE k FROM tblKPIs AS k 
INNER JOIN tblKeyPointLinks AS l ON k.KPIID = l.KPIID 
INNER JOIN tblKeyPoints AS p ON p.KptID = l.KptID 
INNER JOIN tblHistory AS h ON h.HistoryID = p.HistoryID 
WHERE h.CaseNo = 50043; 

Answer 2

你可能只是這樣做：

DELETE FROM tblKPIs 
    WHERE id in (
    SELECT id 
     FROM tblKPIs AS k 
     INNER JOIN tblKeyPointLinks AS l ON k.KPIID = l.KPIID 
     INNER JOIN tblKeyPoints AS p ON p.KptID = l.KptID 
     INNER JOIN tblHistory AS h ON h.HistoryID = p.HistoryID 
     WHERE h.CaseNo = 50043) 

Answer 3

成功的代碼如下：

DELETE k 
FROM tblKPIs k 
    INNER JOIN tblKeyPointLinks l ON k.KPIID = l.KPIID 
    INNER JOIN tblKeyPoints p ON p.KptID = l.KptID 
    INNER JOIN tblHistory h ON h.HistoryID = p.HistoryID 
WHERE h.CaseNo = 50043; 

顯然DELETE聲明不要」 t喜歡使用關鍵字AS 通過簡單的omi關聯AS關鍵字聲明正常工作。