> ## Documentation Index
> Fetch the complete documentation index at: https://docs.firebolt.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Hash functions

> Snowflake hash functions supported in Snowflake compatibility mode.

<span className="feature-tag">Preview</span>

Snowflake [hash functions](https://docs.snowflake.com/en/sql-reference/functions-hash-scalar) in [Snowflake compatibility mode](/reference-sql/snowflake/overview).

| Function           | Support          | Notes                                                                             |
| :----------------- | :--------------- | :-------------------------------------------------------------------------------- |
| `HASH`, `HASH_AGG` | With limitations | Available, but the hash algorithm differs from Snowflake, so values do not match. |

## Limitations

The hash algorithm differs from Snowflake's, so values do not match. Anything that persists a hash will not line up across the two systems: a bucketing key, a change-detection column, or a join key computed on both sides.