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java分布式Producer分区

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java分布式流式处理组件Producer分区理论
目录前言为什么需要分区分区的作用分区策略DefaultPartitionerRoundRobinPartitioner自定义分区器代码说明前言
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In SQL, what does Group By mean without Count(*), or Sum(), Max(), avg(), ..., and what are some uses of it?
In SQL, if we use Group By without Count(*) or Sum(), etc, then the result is as follows: mysql>select * from sentGifts;
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