query: MongoDB $project: Retain previous pipeline fields
positive_passages.docid: 150620
positive_passages.text: Include all existing fields and add new fields to document
negative_passages.docid: 131273
negative_passages.text: Deleting a key/value from existing MongoDB entry
negative_passages.docid: 67204
negative_passages.text: Automatically remove referencing objects on deletion in MongoDB
negative_passages.docid: 133520
negative_passages.text: Create database fields to an existing table when installing a module
negative_passages.docid: 114527
negative_passages.text: Reusing pipe data for different commands
negative_passages.docid: 132829
negative_passages.text: Does MongoDB reuse deleted space?
negative_passages.docid: 108903
negative_passages.text: Clean Deleted Field from Database
negative_passages.docid: 69573
negative_passages.text: How to update the _id of one MongoDB Document?
negative_passages.docid: 134097
negative_passages.text: Accessing an object's fields without an active session
negative_passages.docid: 21601
negative_passages.text: How do I manage MongoDB connections in a Node.js web application?
negative_passages.docid: 1866
negative_passages.text: How I can delete all node/field revisions?
negative_passages.docid: 66244
negative_passages.text: How to make SUBST mapping persistent across reboots?
negative_passages.docid: 157785
negative_passages.text: What's the batched Refactor Fields tool "field mapping" syntax in QGIS?
negative_passages.docid: 16807
negative_passages.text: Should I always/ever/never initialize object fields to default values?
negative_passages.docid: 71657
negative_passages.text: Can you specify a key for $addToSet in Mongo?
negative_passages.docid: 111504
negative_passages.text: Is there a way to get back items after /clear command
negative_passages.docid: 88464
negative_passages.text: How does lookup in $PATH work under the hood?