糟糕的应用程序逻辑可能使用直接耦合方法来调用多个具有大量数据传输的事务，尽管此方法一般会避免较大的路径长度。
Poor application logic may invoke multiple transactions with large data transfer with the direct coupling approach, though this approach generally avoids greater path lengths.
DB 2直接在服务器上执行这些更新，最小化了应用程序编程逻辑和数据传输。
DB2 performs these updates directly on the server, minimizing the application programming logic and transfer of data that otherwise need to occur.
但 SDO 与数据传输对象依然存在共性：仅传送数据，没有为之定义的应用方法或业务逻辑。
They still have this in common with Data Transfer Objects, though: They are only carriers of data and do not have application methods or business logic defined for them.
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