In this sample, two database tables are imported from DB2, and the XML structure is extracted from the sample file.
这个示例从DB 2中导入两个数据库表，并从示例文件中提取XML结构。
Definition: a relationship exists between two database tables when one table has a foreign key that references the primary key of another table.
定义：当两个表中，一个表的外键和另一个表的主键存在一种关联关系，我们把这种关系称为数据库关系。
Definition: a relationship exists between two database tables when one table has a foreign key that references the primary key of another table.
定义：当两个表中，一个表的外键和另一个表的主键存在一种关联关系，我们把这种关系称为数据库关系。
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