Blakes Seven questions

Blakes Seven answers

• Remove Duplicates from MongoDB
• Mongo Group and sum with two fields
• Mongo convert embedded document to array
• Sort and paginate a collection
• Mongo aggregation within intervals of time
• Sort Documents Without Existing Field to End of Results
• MongoDB advanced aggregation
• Project nested array field values by their indexes in aggregation
• count array occurrences across all documents with mongo
• How to properly delete an orphaned reference in MongoDB?