Kettle 合并记录和Merge Join组件实现数据增量迁移（数据同步比插入更新快）

https://blog.csdn.net/lan12334321234/article/details/70049477?utm_medium=distribute.pc_relevant_download.none-task-blog-baidujs-1.nonecase&depth_1-utm_source=distribute.pc_relevant_download.none-task-blog-baidujs-1.nonecase

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