> For the complete documentation index, see [llms.txt](https://docs.deltastream.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.deltastream.io/overview.md).

# Overview

- [What is DeltaStream?](https://docs.deltastream.io/overview/readme.md): How DeltaStream combines streaming and batch processing for real-time analytics using the compute engine of your choice.
- [Core Concepts](https://docs.deltastream.io/overview/core-concepts.md): Understand the basic concepts and technologies that underpin DeltaStream
- [Access Control](https://docs.deltastream.io/overview/core-concepts/access-control.md): How DeltaStream handles user access
- [Compute Pools](https://docs.deltastream.io/overview/core-concepts/compute-pools.md): Get real-time analytics from data stored in Iceberg tables.
- [Data Store](https://docs.deltastream.io/overview/core-concepts/store.md): How DeltaStream works with your data stores
- [Database](https://docs.deltastream.io/overview/core-concepts/databases.md): Data organization in DeltaStream
- [Function](https://docs.deltastream.io/overview/core-concepts/function.md): Defining your own functions in DeltaStream to extend DeltaStream capabilities for your business
- [Query](https://docs.deltastream.io/overview/core-concepts/queries.md): Querying data in DeltaStream -- how you get things done
- [Region](https://docs.deltastream.io/overview/core-concepts/region.md): The impact of regional data storage in DeltaStream
- [SQL](https://docs.deltastream.io/overview/core-concepts/sql.md): Do everything you need in DeltaStream using only SQL
- [Visualizing Data Lineage](https://docs.deltastream.io/overview/core-concepts/stream-360.md): Display your DeltaStream ecosystem in adjustable flowchart form.