数据建模：包装器负责将远程查询结果的数据表示映射为联邦引擎所要求的表格式。
Data modeling: a wrapper is responsible for mapping the data representation of remote query results into the table format as required by the federated engine.
检索到数据以后，将以包含查询结果的xml列表格式提供数据，如下所示。
After the data has been retrieved, it is supplied in an XML list format that contains the results of the query, as shown below.
CLPPlus提供多个命令，您可以使用这些命令为已执行的查询指定报表格式。
CLPPlus provides several commands that you can use to specify the report format for an executed query. These commands can be broadly categorized into three categories.
提供对试车数据的查询，更新等操作，从数据库中读取相关数据，并生成特定的报表格式。
Provide the function to select the test data, and generate the given form of the related data re ad from the database.
提供对试车数据的查询，更新等操作，从数据库中读取相关数据，并生成特定的报表格式。
Provide the function to select the test data, and generate the given form of the related data re ad from the database.
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