导出Access数据到一个外部文件，并可以讲该导出文件导入到与原数据库表结构存在一些差异的数据库中，数据库变更时，用此程序不错，且导入导出速度很快。-Export Access data to an external file, and can talk about the export file into the original database table, there are some differences in the structure of the database, the d