match regex operator
Filters a record set based on a case-sensitive regex value.
For further information about other operators and to determine which operator is most appropriate for your query, see datatype string operators.
Performance tips
Note
Performance depends on the type of search and the structure of the data.
For best practices, see Query best practices.
Syntax
T | where col matches regex (expression)
Arguments
- T - The tabular input whose records are to be filtered.
- col - The column to filter.
- expression - Scalar or literal expression.
Returns
Rows in T for which the predicate is true.
Example
StormEvents
| summarize event_count=count() by State
| where State matches regex "K.*S"
| where event_count > 10
| project State, event_count
Output
| State | event_count |
|---|---|
| KANSAS | 3166 |
| ARKANSAS | 1028 |
| LAKE SUPERIOR | 34 |
| LAKE ST CLAIR | 32 |