清单2显示了一个通过字符串串联创建此类键的示例算法。

Listing 2 shows a sample algorithm which creates such a key by string concatenation.

youdao

您必须了解在产生的资料集程序码中，如何建立资料库中的外部索引键条件约束和串联行为。

It is important to understand how foreign-key constraints and cascading behavior in the database are created in the generated dataset code.

youdao