Imagine you need to delete the related_comics field from all documents in the comic_books collection. Here's how you can do that using the $unset operator:
In this snippet, we first switch to the comic_book_store_db database using the use command. We then call the updateMany method on the comic_books collection to update all documents within it. The empty {} object specifies that the update should apply to every document. The $unset operator, followed by { related_comics: "" }, removes the related_comics field from all documents in the collection, effectively cleaning up the dataset by deleting this field.
Now that you know how to remove fields, let's see how you can rename them. In the example below, you rename the published_year field to year_published:
In this snippet, we switch to the comic_book_store_db database and call the updateMany method again. The empty {} selector ensures that all documents are targeted. The $rename operator with { "published_year": "year_published" } specifies that the field published_year should be renamed to year_published. This not only makes the field name more descriptive but also ensures consistency across your data schema.
