MongoDB Fundamentals For Developers-Learn By Exercises

Create a socializing database and posts collection, then insert a document with post date, author first name and last name, likes, comments, and content, and verify with a read query.

Update multiple documents by enabling the multi parameter in the update command and add a new field named disliked with a default value of 0 across the entire collection.

Apply the $inc operator to update documents by increasing or decreasing the liked field using a query selector and multi: true to modify matching posts.

Explore projection and comparison operators in MongoDB by querying the book collection, filtering by price and title, projecting specific fields, and sorting and limiting results for readability.

Explore or, and, and not operators in MongoDB to filter books by price between 20 and 40 and query orders before October 15, 2015.

Learn how to use single purpose aggregation functions in MongoDB, counting via count() with a filter on enrollment in a science class, and listing distinct ages for each age group.