hive 当年第一天

要获取Hive中当年的第一天，可以使用以下SQL语句：

SELECT trunc(current_date, 'YEAR') AS 当年第一天 FROM dual;

这个语句中，`trunc`函数将当前日期截断到年份，并返回当年的第一天。`'YEAR'`参数指定截断的单位为年。执行这个语句后，就可以得到Hive中当年的第一天。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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