Each index document also has multi-value field UNIDs, which contain the UNIDs of all documents in the source database that match the keyword assigned for that index document.
每一个索引文档也具有多值字段unid，其中包含与为该索引文档分配的关键字相匹配的源数据库中的所有文档的UNID。
Easy language multi-threaded database query source code, a good reference, there is a need to download it.
说明：易语言多线程数据库查询对比源码，很好的参考资料，有需要的就下载吧。
Routine ACCESS multi table query, database programming source code, a good reference.
说明：ACCESS多表查询例程，数据库编程源码，很好的参考资料。
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