The case-insensitive has_all string operator

Filters a record set for data with one or more case-insensitive search strings. has_all searches for indexed terms, where an indexed term is three or more characters. If your term is fewer than three characters, the query scans the values in the column, which is slower than looking up the term in the term index.

For more information about other operators and to determine which operator is most appropriate for your query, see datatype string operators.

Syntax

T | where col has_all (expression, … )

Parameters

Returns

Rows in T for which the predicate is true.

Examples

Set of scalars

The following query shows how to use has_all with a comma-separated set of scalar values.

StormEvents 
| where EpisodeNarrative has_all ("cold", "strong", "afternoon", "hail")
| summarize Count=count() by EventType
| top 3 by Count

Output

Dynamic array

The same result can be achieved using a dynamic array notation.

StormEvents 
| where EpisodeNarrative has_all (dynamic(["cold", "strong", "afternoon", "hail"]))
| summarize Count=count() by EventType
| top 3 by Count

Output

The same query can also be written with a let statement.

let criteria = dynamic(["cold", "strong", "afternoon", "hail"]);
StormEvents 
| where EpisodeNarrative has_all (criteria)
| summarize Count=count() by EventType
| top 3 by Count