以下关于%ROWTYPE的作用说法正确的是()。

A、使用%ROWTYPE来定义一个表示表中一行记录的变量

B、使用%ROWTYPE的变量不能实现将一行记录的部分字段赋值

C、使用%ROWTYPE将一个变量的数据类型与一张表中记录的各个列的数据类型保持一致

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