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!~ (not equals) operator

Applies to: ✅ Microsoft FabricAzure Data ExplorerAzure MonitorMicrosoft Sentinel

Filters a record set for data that doesn't match a case-insensitive string.

The following table provides a comparison of the == (equals) operators:

Operator Description Case-Sensitive Example (yields true)
== Equals Yes "aBc" == "aBc"
!= Not equals Yes "abc" != "ABC"
=~ Equals No "abc" =~ "ABC"
!~ Not equals No "aBc" !~ "xyz"

For more 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.

When possible, use the case-sensitive !=.

Syntax

T | where column !~ (expression)

Learn more about syntax conventions.

Parameters

Name Type Required Description
T string ✔️ The tabular input whose records are to be filtered.
column string ✔️ The column by which to filter.
expression scalar ✔️ The scalar or literal expression for which to search.

Returns

Rows in T for which the predicate is true.

Example

StormEvents
| summarize event_count=count() by State
| where (State !~ "texas") and (event_count > 3000)
| project State, event_count

Output

State event_count
KANSAS 3,166