Question

我有一个与某些列匹配的SSIS包，并将其传输到“匹配”表中，因为报告来自供应商。

报告进来，数据放入“传入”表中。在这之后。我加入某些列和某个列不是NULL（匹配的列）的记录，并将它们放入“匹配”表中。

我的问题是：

如何删除与我加入的表格匹配的记录？

以下是我要从“Incoming”表中删除的记录的连接声明：

SELECT * FROM Incoming I
LEFT OUTER JOIN Mathced M
ON I.Name = M.Name AND I.Type = M.Type AND I.Op = M.Op AND I.DSource = M.DSource AND IDate = M.Date
WHERE M.MatchedID IS NOT NULL

Answer 1

试试这个：

DELETE FROM Incoming I
LEFT OUTER JOIN Mathced M
  ON I.Name = M.Name
    AND I.Type = M.Type
    AND I.Op = M.Op
    AND I.DSource = M.DSource
    AND I.Date = M.Date
WHERE M.MatchedID IS NOT NULL

Answer 2

DELETE FROM Incoming I
LEFT OUTER JOIN Mathced M
ON I.Name = M.Name AND I.Type = M.Type AND I.Op = M.Op 
                   AND I.DSource = M.Source AND IDate = M.Date
WHERE M.MatchedID IS NOT NULL

Answer 3

这是正确答案：

DELETE I FROM Incoming I LEFT OUTER JOIN Matched M ON I.Name = M.Name AND I.Type = M.Type AND I.Op = M.Op AND I.DSource = M.DSource AND I.Date = M.Date WHERE M.MatchedID IS NOT NULL

......因为你首先必须告诉DBMS你要从哪个表中删除，然后使用别名来说明JOIN

在一个表中删除记录，这些记录与另一个表中的记录相同

3 个答案: