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[数据库] 两个线程一起从表中取数据，表和 sql 如何设计呢？

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一个任务表，两个线程同时每次取一条数据执行业务逻辑，然后把这条数据标记为完成或暂时放弃，暂时放弃的后面会被再次取出

要求同一条数据不能被多个线程同时取出

求优秀的设计方案

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