row_number 随机数 数据倾斜

对于数据倾斜问题，可以使用随机数来解决。具体做法是将数据的key值与一个0到分区数之间的随机数相加，得到新的key值，然后再进行处理。这样可以将原本导致数据倾斜的大值key分散到多个分区中，从而实现数据的均衡分布。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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