hash_sha1()
Returns a sha1 hash value of the source input.
Syntax
hash_sha1(source)
Learn more about syntax conventions.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
| source | scalar | ✔️ | The value to be hashed. |
Returns
The sha1 hash value of the given scalar, encoded as a hex string (a string of characters, each two of which represent a single Hex number between 0 and 255).
Warning
The algorithm used by this function (SHA1) is guaranteed to not be modified in the future, but is very complex to calculate. If you need a "lightweight" hash function for the duration of a single query, consider using hash().
Examples
print
h1=hash_sha1("World"),
h2=hash_sha1(datetime(2020-01-01))
Output
| h1 | h2 |
|---|---|
| 70c07ec18ef89c5309bbb0937f3a6342411e1fdd | e903e533f4d636b4fc0dcf3cf81e7b7f330de776 |
The following example uses the hash_sha1() function to aggregate StormEvents based on State's SHA1 hash value.
StormEvents
| summarize StormCount = count() by State, StateHash=hash_sha1(State)
| top 5 by StormCount desc
Output
| State | StateHash | StormCount |
|---|---|---|
| TEXAS | 3128d805194d4e6141766cc846778eeacb12e3ea | 4701 |
| KANSAS | ea926e17098148921e472b1a760cd5a8117e84d6 | 3166 |
| IOWA | cacf86ec119cfd5b574bde5b59604774de3273db | 2337 |
| ILLINOIS | 03740763b16dae9d799097f51623fe635d8c4852 | 2022 |
| MISSOURI | 26d938907240121b54d9e039473dacc96e712f61 | 2016 |