startswith_cs operator

Filters a record set for data with a case-sensitive string starting sequence.

The following table provides a comparison of the startswith operators:

Operator Description Case-Sensitive Example (yields true)
startswith RHS is an initial subsequence of LHS No "Fabrikam" startswith "fab"
!startswith RHS isn't an initial subsequence of LHS No "Fabrikam" !startswith "kam"
startswith_cs RHS is an initial subsequence of LHS Yes "Fabrikam" startswith_cs "Fab"
!startswith_cs RHS isn't an initial subsequence of LHS Yes "Fabrikam" !startswith_cs "fab"

Note

The following abbreviations are used in the table above:

  • 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 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, hassuffix_cs, not hassuffix. For best practices, see Query best practices.

Syntax

T | where col startswith_cs (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 startswith_cs "I"
    | where event_count > 2000
    | project State, event_count

Output

State event_count
IOWA 2337
ILLINOIS 2022