hash_sha256()
Applies to: ✅ Azure Data Explorer ✅ Azure Monitor ✅ Microsoft Sentinel
Returns a sha256 hash value of the source input.
Syntax
hash_sha256(source)
Learn more about syntax conventions.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
| source | scalar | ✔️ | The value to be hashed. |
Returns
The sha256 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 (SHA256) is guaranteed to not be modified in the future, but is very complex to calculate. Users that need a "lightweight" hash function for the duration of a single query are advised to use the function hash() instead.
Examples
print
h1=hash_sha256("World"),
h2=hash_sha256(datetime(2020-01-01))
Output
| h1 | h2 |
|---|---|
| 78ae647dc5544d227130a0682a51e30bc7777fbb6d8a8f17007463a3ecd1d524 | ba666752dc1a20eb750b0eb64e780cc4c968bc9fb8813461c1d7e750f302d71d |
The following example uses the hash_sha256() function to aggregate StormEvents based on State's SHA256 hash value.
StormEvents
| summarize StormCount = count() by State, StateHash=hash_sha256(State)
| top 5 by StormCount desc
Output
| State | StateHash | StormCount |
|---|---|---|
| TEXAS | 9087f20f23f91b5a77e8406846117049029e6798ebbd0d38aea68da73a00ca37 | 4701 |
| KANSAS | c80e328393541a3181b258cdb4da4d00587c5045e8cf3bb6c8fdb7016b69cc2e | 3166 |
| IOWA | f85893dca466f779410f65cd904fdc4622de49e119ad4e7c7e4a291ceed1820b | 2337 |
| ILLINOIS | ae3eeabfd7eba3d9a4ccbfed6a9b8cff269dc43255906476282e0184cf81b7fd | 2022 |
| MISSOURI | d15dfc28abc3ee73b7d1f664a35980167ca96f6f90e034db2a6525c0b8ba61b1 | 2016 |