Can anyone please tell me what tech shoul开发者_如何学JAVAd i use for archiving & purging the historic data.
As Justin said in his comment this is a broad question. A broad answer is to use Oracle Partitioning. In general this will allow you to treat subsets of data with DDL (truncating, moving, or dropping partitions) instead of more resource-intensive DML.
As part of the solution you might want to consider table compression. It can potentially save a lot of space.
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是否在对方手机上显示已读，是由用户自行设置的。依次打开iPhone的“设置-信息”，会有一个“发送已读回执”的选项。将其打开，对方就能看到你，是否已经阅读了本条iMessage信息。将其关闭，对方就看不到。
微信重新建群怎么开发者_Go百科建？ 产品名称：苹果手机 产品型号：iPhone 11 系统版本：iOS 13
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