The transformer carries out a lookup action in non-primary tables for records of the primary table.

对于主表的记录，转换器对非主表进行查找。

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You can also establish a foreign key in a secondary table to link with a primary key in a primary table.

您还可以在次表中建立外键，以链接主表中的主键。

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For a single record of the primary table, only one record will be retrieved from the non-primary tables.

对于主表的每条记录，只从非主表中检索一条记录。

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For a single record of the primary table, only one record will be retrieved from the non-primary tables.

对于主表的每条记录，只从非主表中检索一条记录。

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