# Collection Group Queries

Published articles for Collection Group Queries.

This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles.

## Introducing COUNT, TTLs, and better scaling in Firestore

DevFeed: [Introducing COUNT, TTLs, and better scaling in Firestore](<https://devfeed.tech/articles/introducing-count-ttls-and-better-scaling-in-firestore-16499.md>)

Original publisher: [Read original article](<https://firebase.blog/posts/2022/12/introducing-firestore-count-ttl-scale>)

Author: Rafi Khan; David East

Published: 2022-12-08T00:00:00Z

Content type: release

Language: en

Sources: [Firebase Blog](<https://devfeed.tech/sources/firebase-blog.md>)

Topics: [Firestore](<https://devfeed.tech/topics/firestore.md>), [Database](<https://devfeed.tech/topics/database.md>), [Cloud](<https://devfeed.tech/topics/cloud.md>)

Tags: [collection-group-queries](<https://devfeed.tech/tags/collection-group-queries.md>), [database](<https://devfeed.tech/tags/database.md>), [firebase](<https://devfeed.tech/tags/firebase.md>), [firestore](<https://devfeed.tech/tags/firestore.md>), [launch](<https://devfeed.tech/tags/launch.md>), [new-features](<https://devfeed.tech/tags/new-features.md>), [offline](<https://devfeed.tech/tags/offline.md>), [realtime](<https://devfeed.tech/tags/realtime.md>)

### AI overview

This release introduces Firestore count aggregation queries, improved scaling capabilities, and time-to-live policies for automatically deleting documents. Count aggregation is available in the Web, Android, iOS, and Node.js SDKs, including collection group queries, but is server-only and still in Preview.

### Source excerpt

Yes. Count is here!

## Understanding Collection Group Queries in Cloud Firestore

DevFeed: [Understanding Collection Group Queries in Cloud Firestore](<https://devfeed.tech/articles/understanding-collection-group-queries-in-cloud-firestore-16319.md>)

Original publisher: [Read original article](<https://firebase.blog/posts/2019/06/understanding-collection-group-queries>)

Author: Todd Kerpelman

Published: 2019-06-20T00:00:00Z

Content type: tutorial

Language: en

Sources: [Firebase Blog](<https://devfeed.tech/sources/firebase-blog.md>)

Topics: [Firestore](<https://devfeed.tech/topics/firestore.md>), [Firebase](<https://devfeed.tech/topics/firebase.md>), [Cloud](<https://devfeed.tech/topics/cloud.md>), [SDK](<https://devfeed.tech/topics/sdk.md>), [Google](<https://devfeed.tech/topics/google.md>)

Tags: [best-practices](<https://devfeed.tech/tags/best-practices.md>), [code](<https://devfeed.tech/tags/code.md>), [collection-group-queries](<https://devfeed.tech/tags/collection-group-queries.md>), [feature](<https://devfeed.tech/tags/feature.md>), [firebase](<https://devfeed.tech/tags/firebase.md>), [firebase-console](<https://devfeed.tech/tags/firebase-console.md>), [firestore](<https://devfeed.tech/tags/firestore.md>), [google-i-o](<https://devfeed.tech/tags/google-i-o.md>), [tutorials](<https://devfeed.tech/tags/tutorials.md>)

### AI overview

This tutorial explains collection group queries in Cloud Firestore, which let developers query documents across multiple collections with the same name. It also describes enabling the required indexes through the Firebase Console or client SDK workflow.

### Source excerpt

News, tutorials, and updates from the Firebase team.