case when 语句

case when语句是一种在业务逻辑中常见的处理方式。它有两种形式：简单case when和case搜索函数法。简单case when只能处理等式问题，而case搜索函数法可以处理等式问题和不等式问题。简单的case when语句的语法逻辑是通过指定多个条件和对应的结果来实现逻辑判断。在查询中，可以使用case when语句来进行数据映射处理，将某个字段的值映射为另一个值。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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- *1* *2* [sql语句case when常用查询总结](https://blog.csdn.net/fengjiandaxia/article/details/125212175)[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^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
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