Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database collection names, folder names, filenames, file extensions, pathnames, dummy URLs, and user input. Here is an example: "When considering the $sort and $group stages, it becomes evident why they have to block."

A block of code is set as follows:

db.persons.find(
    {"vocation": "ENGINEER"},
    {"_id": 0, "vocation": 0, "address": 0},
  ).sort(
    {"dateofbirth": -1}
  ).limit(3);

Bold: Indicates a new term, an important word, or words that you see onscreen. For instance, words in menus or dialog boxes appear in bold. Here is an example: "A MongoDB database, version 4.2 or greater, that is network accessible from your workstation."

Tips or important notes

Appear like this.