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为什么要用毫秒值的形式存储日期时间？
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程序员 - @5ispy - 哪位帮忙解答一下，实际工作中在哪种情况下，很有必要把时间转换成毫秒值进行存储？ 比如某条数据的创建时间，查询的时候不论是程序里还是写 sql 查询还需要转换，很不方便啊，为什么还要用这
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