TSQL删除使用内部联接

Question

下面的SQL语句执行罚款，我的数据库：

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，相当于delete语句提供了一个错误“语法附近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语句中使用连接吗？

如果不是我如何执行上面的Delete？

EDIT

表tblKeyPointLinks为中间表建立tblKPIs和tblKeyPoints之间的多对多的关系。因此SELECT语句不止一次返回tblKPIs中的一些条目。这就是为什么DELETE语句可能有问题吗？解决此问题的最佳方法是什么？

Answer 1

是的，你可以在delete语句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

你可能只是这样做：

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

成功的代码如下：

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; 

显然DELETE声明不要” t喜欢使用关键字AS 通过简单的omi关联AS关键字声明正常工作。