mybatis sum 字段类型

根据提供的引用内容，可以得出mybatis sum字段的类型是char。在引用[1]中，可以看到对sum字段进行了类型转换，将其改为char类型。引用中也提到了使用ifnull语句来处理sum字段为null的情况，并设置默认值为0，进一步说明了sum字段的类型是char。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [记录一次mybatis使用mysql的sum统计string类型后返回值为对象值[B@69df0dd2](https://blog.csdn.net/qq_34412985/article/details/111768660)[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_1"}}] [.reference_item style="max-width: 50%"]
- *2* *3* [mybatis sum函数返回为null的解决方式,格式化小数千分位的问题](https://blog.csdn.net/omayyouhappy/article/details/72770543)[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_1"}}] [.reference_item style="max-width: 50%"]
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