alenfive commented on issue #2117:
URL: https://github.com/apache/doris/issues/2117#issuecomment-1324854366

   1. REPLACE_IF_NOT_NULL 很好的解决了聚合模式下的末次的需求
   2. 现在我还有一个首次的需求,如用户首次访问了哪篇文章,期待有REPALCE_IF_NULL 
的函数,对库中已经存在的数据进行判断,如果为NULL,则替换
   3. min函数能够获得最早的时间,但无法对文本类型作首次判断,或者你有更好的建议
   
   首次访问[最早的一条记录]的需求在数据分析场景中蛮常见和重要的
   
   


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