Single Field Indexes

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Overview

Sample Data
Create Single Field Index

Overview

Single field indexes are indexes with a reference to a single field within a collection's documents. They improve single field query and sort performance, and support TTL Indexes that automatically remove documents from a collection after a certain amount of time or at a specific clock time.

Note

The _id_ index is an example of a single field index. This index is automatically created on the _id field when a new collection is created.

Sample Data

The examples in this guide use the sample_mflix.movies collection from the Atlas sample datasets. To learn how to create a free MongoDB Atlas cluster and load the sample datasets, see the Get Started with PyMongo.

Create Single Field Index

The following example creates an index in ascending order on the title field:

movies.create_index("title")

The following is an example of a query that is covered by the index created in the preceding code example:

query = { "title": "Batman" }
sort = [("title", 1)]
cursor = movies.find(query).sort(sort)

To learn more, see Single Field Indexes in the MongoDB Server manual.

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Work with Indexes

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