Introduction

So far, we have covered querying using various operators to prepare query expressions. We have also learned how to create, delete, and modify documents in the collection, used various delete and update functions, and considered their differences and usability. We have also covered how to replace documents and how to perform upsert operations using a number of update operators. Now it is time to practice more complex update operations using the aggregation pipeline support, and learn how to modify arrays in a document.

We will begin this chapter with MongoDB pipeline support, where we will briefly introduce the aggregation pipeline and how it helps you to perform more complex update operations. We will then cover how to update array fields, how to add and sort elements of an existing array, and use an array as a set of unique elements. Next, you will learn how to remove the first, last, or another specific element from an array. Finally, you will learn how to prepare...