mongodb文档属性

为什么第二种方法不成功，是不是x.fieldName语句，这个fieldName只能指定死，不能根据动态传入的值来获取对应的field。

下边示例是使用kettle工具实现文档属性字段合并的数据转换：先使用MongoChref连接上MongoDB 现在，我们从datatrans集合往dataresult集合抽取数据，并实现数据转换：转换输入连接设置转换输入源设置输入源设置完成后可以点击预览查看要...

mongodb如何批量修改内嵌文档的属性？

如何用一条命令把message数组中2个对象元素中的status属性都改成false？是否只能在客户端做逻辑处理：

mongodb批量将集合内文档中的一个属性值赋给另个一属性

mongodb怎么批量把集合内文档中的一个属性值赋给另个一属性,如下为集合logs中的内容，怎么批量把每个文档中category的值赋值给data。

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云数据库 MongoDB 版

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