Filters a record set for data that does not start with a case-sensitive search string.
The following table provides a comparison of the
||RHS is an initial subsequence of LHS||No||
||RHS isn't an initial subsequence of LHS||No||
||RHS is an initial subsequence of LHS||Yes||
||RHS isn't an initial subsequence of LHS||Yes||
- RHS = right hand side of the expression
- LHS = left hand side of the expression
For further information about other operators and to determine which operator is most appropriate for your query, see datatype string operators.
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,
If you're testing for the presence of a symbol or alphanumeric word that is bound by non-alphanumeric characters at the start or end of a field, for faster results use
- T - The tabular input whose records are to be filtered.
- col - The column to filter.
- expression - Scalar or literal expression.
Rows in T for which the predicate is
events | project original_time, data_source_name | where data_source_name !startswith_cs "Cisco" |take 3