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arg_min() (aggregation function)
Applies to: ✅ Microsoft Fabric ✅ Azure Data Explorer ✅ Azure Monitor ✅ Microsoft Sentinel
Finds a row in the group that minimizes ExprToMinimize.
Note
This function is used in conjunction with the summarize operator.
Deprecated aliases: argmin()
Syntax
arg_min (ExprToMinimize, * | ExprToReturn [, ...])
Learn more about syntax conventions.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
| ExprToMinimize | string |
✔️ | The expression used for aggregation calculation. |
| ExprToReturn | string |
✔️ | The expression used for returning the value when ExprToMinimize is minimum. Use a wildcard (*) to return all columns of the input table. |
Null handling
When ExprToMinimize is null for all rows in a group, one row in the group is picked. Otherwise, rows where ExprToMinimize is null are ignored.
Returns
Returns a row in the group that minimizes ExprToMinimize, and the value of ExprToReturn. Use or * to return the entire row.
Examples
Find the minimum latitude of a storm event in each state.
StormEvents
| summarize arg_min(BeginLat, BeginLocation) by State
The results table shown includes only the first 10 rows.
| State | BeginLat | BeginLocation |
|---|---|---|
| AMERICAN SAMOA | -14.3 | PAGO PAGO |
| CALIFORNIA | 32.5709 | NESTOR |
| MINNESOTA | 43.5 | BIGELOW |
| WASHINGTON | 45.58 | WASHOUGAL |
| GEORGIA | 30.67 | FARGO |
| ILLINOIS | 37 | CAIRO |
| FLORIDA | 24.6611 | SUGARLOAF KEY |
| KENTUCKY | 36.5 | HAZEL |
| TEXAS | 25.92 | BROWNSVILLE |
| OHIO | 38.42 | SOUTH PT |
| ... | ... | ... |
Find the first time an event with a direct death happened in each state showing all of the columns.
StormEvents
| where DeathsDirect > 0
| summarize arg_min(StartTime, *) by State
The results table shown includes only the first 10 rows and first 3 columns.
| State | StartTime | EndTime | ... |
|---|---|---|---|
| INDIANA | 2007-01-01T00:00:00Z | 2007-01-22T18:49:00Z | ... |
| FLORIDA | 2007-01-03T10:55:00Z | 2007-01-03T10:55:00Z | ... |
| NEVADA | 2007-01-04T09:00:00Z | 2007-01-05T14:00:00Z | ... |
| LOUISIANA | 2007-01-04T15:45:00Z | 2007-01-04T15:52:00Z | ... |
| WASHINGTON | 2007-01-09T17:00:00Z | 2007-01-09T18:00:00Z | ... |
| CALIFORNIA | 2007-01-11T22:00:00Z | 2007-01-24T10:00:00Z | ... |
| OKLAHOMA | 2007-01-12T00:00:00Z | 2007-01-18T23:59:00Z | ... |
| MISSOURI | 2007-01-13T03:00:00Z | 2007-01-13T08:30:00Z | ... |
| TEXAS | 2007-01-13T10:30:00Z | 2007-01-13T14:30:00Z | ... |
| ARKANSAS | 2007-01-14T03:00:00Z | 2007-01-14T03:00:00Z | ... |
| ... | ... | ... | ... |
The following example demonstrates null handling.
datatable(Fruit: string, Color: string, Version: int) [
"Apple", "Red", 1,
"Apple", "Green", int(null),
"Banana", "Yellow", int(null),
"Banana", "Green", int(null),
"Pear", "Brown", 1,
"Pear", "Green", 2,
]
| summarize arg_min(Version, *) by Fruit
Output
| Fruit | Version | Color |
|---|---|---|
| Apple | 1 | Red |
| Banana | Yellow | |
| Pear | 1 | Brown |