hive窗口函数详解

窗口函数是一种在Hive中用于分析数据的函数。它指定了函数工作的数据窗口大小，也就是当前行的上下多少行。与聚合函数不同，窗口函数对于每个组返回多行，而聚合函数只返回一行。在日常的开发中，常用的窗口函数包括sum() over()、count() over()等。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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