hive的nvl函数

Hive中的NVL函数与SQL中的NVL函数功能相似，用于判断一个值是否为空，并返回相应的结果。其语法格式为NVL(expr1, default_value)，如果expr1为空，则返回default_value，否则返回expr1的值。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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- *1* *3* [Hive SQL NVL 相关函数](https://blog.csdn.net/weixin_30929195/article/details/95351859)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}}] [.reference_item style="max-width: 50%"]
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