---
metadata:
  - name: generator
    content: Diplodoc Platform v5.50.6
alternate:
  - https://ydb.tech/docs/en/dev/streaming-query.md?version=main
  - https://ydb.tech/docs/ru/dev/streaming-query.md?version=main
sourcePath: en/core/dev/streaming-query/index.md
---
> **Documentation Index:** Fetch the complete configuration index at https://ydb.tech/docs/en/llms.txt

# Streaming queries

Practical aspects of working with [streaming queries](https://ydb.tech/docs/en/concepts/glossary.md?version=main#streaming-query):

- [Using local and external topics](https://ydb.tech/docs/en/dev/streaming-query/local-and-external-topics.md?version=main)
- [Typical patterns](https://ydb.tech/docs/en/dev/streaming-query/patterns.md?version=main) — minimal examples for a quick start
- [Writing to tables](https://ydb.tech/docs/en/dev/streaming-query/table-writing.md?version=main) — how streaming queries allow writing data to YDB tables in real time.
- [Data enrichment](https://ydb.tech/docs/en/dev/streaming-query/enrichment.md?version=main) — ways to enrich data in the stream using reference data.
- [Data formats for reading/writing topics](https://ydb.tech/docs/en/dev/streaming-query/streaming-query-formats.md?version=main) — supported data formats when working with topics, examples of their use.
- [Data delivery guarantees](https://ydb.tech/docs/en/dev/streaming-query/guarantees.md?version=main) — level of guarantees, observed anomalies in window aggregation, and recommendations.
- [Checkpoints](https://ydb.tech/docs/en/dev/streaming-query/checkpoints.md?version=main) — a mechanism for saving the state of stream processing to ensure fault tolerance and recovery capability.
- [Watermarks](https://ydb.tech/docs/en/dev/streaming-query/watermarks.md?version=main) — a mechanism for tracking time progress in a data stream.

## See also

- [Recipes for working with streaming queries](https://ydb.tech/docs/en/recipes/streaming_queries/index.md?version=main)
- [Description of streaming queries](https://ydb.tech/docs/en/concepts/streaming-query/streaming-query.md?version=main)