Unless it is a bit-field (9.6), a most derived object shall have a non-zero size and shall occupy one or more bytes of storage.
除非作为位域(9.6),最终派生对象总是具有非零大小并总占用一个以上字节的存储。
When the function is called through a derived object, the arguments must match a version of the function defined in the derived class.
当调用派生对象的函数时,实参必须和派生类中函数定义相互匹配。
Client code can refer to these methods in their code regardless of the actual Database -derived object used. For example, the following code snippet shows how to use the ExecuteDataSet method.
客户端代码参考它们的方法在代码中,而可以忽视本地的数据库继承类。
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