hive round函数

在Hive中，round()函数用于对数字进行四舍五入操作。它有两种用法：

1. round(number)：默认四舍五入到整数。例如，round(1.5)的结果是2。
2. round(number, decimal_places)：将数字四舍五入到指定的小数位数。例如，round(1.455, 2)的结果是1.46，即四舍五入到百分位。

引用提供了floor()、ceil()和round()函数的用法，floor()函数向下取整，ceil()函数向上取整，而round()函数可实现四舍五入。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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