has_any operator

Article
03/07/2022
2 minutes to read

Filters a record set for data with any of a set of case-insensitive strings. has searches for indexed terms, where a 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.

Performance tips

Note

Performance depends on the type of search and the structure of the data.

For faster results, use the case-sensitive version of an operator, for example, has_cs, not has. For best practices, see Query best practices.

Syntax

T | where Column has_any (list of scalar expressions)
T | where Column has_any (tabular expression)

Arguments

T - Tabular input whose records are to be filtered.
Column - Column to filter.
list of expressions - Comma separated list of scalar or literal expressions
tabular expression - Tabular expression that has a set of values (if expression has multiple columns, the first column is used)

Returns

Rows in T for which the predicate is true

Notes

The expression list can produce up to 10,000 values.
For tabular expressions, the first column of the result set is selected.

Examples

Use has_any operator with a list

StormEvents 
| where State has_any ("CAROLINA", "DAKOTA", "NEW") 
| summarize count() by State

Output

State	count_
NEW YORK	1750
NORTH CAROLINA	1721
SOUTH DAKOTA	1567
NEW JERSEY	1044
SOUTH CAROLINA	915
NORTH DAKOTA	905
NEW MEXICO	527
NEW HAMPSHIRE	394

Use has_any operator with a dynamic array

let states = dynamic(['south', 'north']);
StormEvents 
| where State has_any (states)
| summarize count() by State