![How to group on multiple columns and sum up individual columns - Working with Data - MongoDB Developer Community Forums How to group on multiple columns and sum up individual columns - Working with Data - MongoDB Developer Community Forums](https://www.mongodb.com/community/forums/uploads/default/original/2X/7/73701512088dd29f7c6ec1d46cbf8f4539444517.png)
How to group on multiple columns and sum up individual columns - Working with Data - MongoDB Developer Community Forums
![Azure Data Factory (ADF) Dynamic content as field mapping to MongoDB from Azure Blob Storage: Error code: Expression of type: 'String' does not match the field: 'mappingV2' : r/AZURE Azure Data Factory (ADF) Dynamic content as field mapping to MongoDB from Azure Blob Storage: Error code: Expression of type: 'String' does not match the field: 'mappingV2' : r/AZURE](https://preview.redd.it/lg8j1q7wblp91.png?width=1570&format=png&auto=webp&s=2efa1bce49d11d89c6d706b931a2cadd84fc0ef4)
Azure Data Factory (ADF) Dynamic content as field mapping to MongoDB from Azure Blob Storage: Error code: Expression of type: 'String' does not match the field: 'mappingV2' : r/AZURE
![Arguments string1 First string to be joined. string2 Second string to be joined. Up to N number of strings can be specified this way. Here's an example: SELECT CONCAT('Homer' - Eduguru Arguments string1 First string to be joined. string2 Second string to be joined. Up to N number of strings can be specified this way. Here's an example: SELECT CONCAT('Homer' - Eduguru](https://blog.eduguru.in/wp-content/uploads/2019/11/2.4mysql.png)
Arguments string1 First string to be joined. string2 Second string to be joined. Up to N number of strings can be specified this way. Here's an example: SELECT CONCAT('Homer' - Eduguru
![split error message: requires an expression that evaluates to a string - Working with Data - MongoDB Developer Community Forums split error message: requires an expression that evaluates to a string - Working with Data - MongoDB Developer Community Forums](https://www.mongodb.com/community/forums/uploads/default/original/2X/1/183cb327b15330e8c92cad30a127493a895c4141.png)
split error message: requires an expression that evaluates to a string - Working with Data - MongoDB Developer Community Forums
![JSON.stringify within an aggregation pipeline - Working with Data - MongoDB Developer Community Forums JSON.stringify within an aggregation pipeline - Working with Data - MongoDB Developer Community Forums](https://www.mongodb.com/community/forums/uploads/default/original/3X/1/8/18acbc626daf76e10deb9c938729e6224d7a62cc.png)