不明确的列名：DELETE在Sqlite中

Question

这是我的查询。

DELETE 
FROM CategoryProduct_MM 
WHERE PrdID IN 
(SELECT PrdID FROM CategoryProduct_MM t1 
INNER JOIN db2.CategoryProduct_MM t2 
ON (t1.PrdID = t2.PrdID AND t1.CategoryID=t2.CategoryID)); 

为什么我得到这个错误？

ambiguous column name: PrdID: DELETE 

Answer 1

DELETE 
FROM CategoryProduct_MM 
WHERE PrdID IN 
(SELECT t1.PrdID FROM CategoryProduct_MM t1 
INNER JOIN db2.CategoryProduct_MM t2 
ON (t1.PrdID = t2.PrdID AND t1.CategoryID=t2.CategoryID));