SQL中的CROSS JOIN与INNER JOIN
CROSS JOIN和之间有什么区别INNER JOIN？ 交叉加入： SELECT Movies.CustomerID, Movies.Movie, Customers.Age, Customers.Gender, Customers.[Education Level], Customers.[Internet Connection], Customers.[Marital Status], FROM Customers CROSS JOIN Movies 内部联接： SELECT Movies.CustomerID, Movies.Movie, Customers.Age, Customers.Gender, Customers.[Education Level], Customers.[Internet Connection], Customers.[Marital Status] FROM Customers INNER JOIN Movies ON Customers.CustomerID = Movies.CustomerID 哪一种更好，为什么我要使用其中一种？