Chapter 5. Queries and aggregation

 

In this chapter
  • Querying an e-commerce data model
  • The MongoDB query language in detail
  • Aggregation with map-reduce and group

 

MongoDB doesn’t use SQL. Rather, it features its own JSON-like query language. We’ve been exploring this language throughout the book, but here we turn to some meatier, real-world examples. In particular, we’re going to revisit the e-commerce data model introduced in the last chapter and present a variety of queries against it. Among the queries you’ll practice are _id lookups, ranges, ordering, and projections. We’ll also survey the MongoDB query language as a whole, looking at each available query operator in detail.

In addition to queries, we’ll cover the related topic of aggregation. ...

Get MongoDB in Action now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.

Start your free trial