---
metadata:
  - name: generator
    content: Diplodoc Platform v5.50.6
alternate:
  - https://ydb.tech/docs/en/yql/reference/udf/list/digest.md
  - https://ydb.tech/docs/ru/yql/reference/udf/list/digest.md
sourcePath: en/core/yql/reference/udf/list/digest.md
---
> **Documentation Index:** Fetch the complete configuration index at https://ydb.tech/docs/en/llms.txt

# Digest

A set of commonly used hash functions.

## List of functions

* `Digest::Crc32c(String{Flags::AutoMap}) -> Uint32`
* `Digest::Crc64(String{Flags::AutoMap}, [Init:Uint64?]) -> Uint64`
* `Digest::Fnv32(String{Flags::AutoMap}, [Init:Uint32?]) -> Uint32`
* `Digest::Fnv64(String{Flags::AutoMap}, [Init:Uint64?]) -> Uint64`
* `Digest::MurMurHash(String{Flags:AutoMap}, [Init:Uint64?]) -> Uint64`
* `Digest::MurMurHash32(String{Flags:AutoMap}, [Init:Uint32?]) -> Uint32`
* `Digest::MurMurHash2A(String{Flags:AutoMap}, [Init:Uint64?]) -> Uint64`
* `Digest::MurMurHash2A32(String{Flags:AutoMap}, [Init:Uint32?]) -> Uint32`
* `Digest::CityHash(String{Flags:AutoMap}, [Init:Uint64?]) -> Uint64`
* `Digest::CityHash128(String{Flags:AutoMap}) -> Tuple<Uint64,Uint64>`
* `Digest::NumericHash(Uint64{Flags:AutoMap}) -> Uint64`
* `Digest::Md5Hex(String{Flags:AutoMap}) -> String`
* `Digest::Md5Raw(String{Flags:AutoMap}) -> String`
* `Digest::Md5HalfMix(String{Flags:AutoMap}) -> Uint64`: MD5 coarsening option (yabs_md5)
* `Digest::Argon2(String{Flags:AutoMap},String{Flags:AutoMap}) -> String`: The second argument is the salt
* `Digest::Blake2B(String{Flags:AutoMap},[String?]) -> String`: The second optional argument is the key
* `Digest::SipHash(Uint64,Uint64,String{Flags:AutoMap}) -> Uint64`
* `Digest::HighwayHash(Uint64,Uint64,Uint64,Uint64,String{Flags:AutoMap}) -> Uint64`
* `Digest::FarmHashFingerprint(Uint64{Flags:AutoMap}) -> Uint64`
* `Digest::FarmHashFingerprint2(Uint64{Flags:AutoMap}, Uint64{Flags:AutoMap}) -> Uint64`
* `Digest::FarmHashFingerprint32(String{Flags:AutoMap}) -> Uint32`
* `Digest::FarmHashFingerprint64(String{Flags:AutoMap}) -> Uint64`
* `Digest::FarmHashFingerprint128(String{Flags:AutoMap}) -> Tuple<Uint64,Uint64>`
* `Digest::SuperFastHash(String{Flags:AutoMap}) -> Uint32`
* `Digest::Sha1(String{Flags:AutoMap}) -> String`
* `Digest::Sha256(String{Flags:AutoMap}) -> String`
* `Digest::IntHash64(Uint64{Flags:AutoMap}) -> Uint64`
* `Digest::XXH3(String{Flags:AutoMap}) -> Uint64`
* `Digest::XXH3_128(String{Flags:AutoMap}) -> Tuple<Uint64,Uint64>`

The functions for the hashes that support the initialization parameter (seed) accept its value in the optional named argument `Init`.

### Examples

```yql
SELECT Digest::Md5Hex("YQL");  -- "1a0c1b56e9d617688ee345da4030da3c"
SELECT Digest::NumericHash(123456789); -- 1734215268924325803
```